ICAMS Members
Prof. Dr. Alexander Hartmaier
InvestigatorChair of Micromechanical and Macroscopic ModellingICAMS
Ruhr-Universität Bochum
IC 02-517
Universitätsstr. 150
44801 Bochum
Tel. +49 234 32 29314
Fax: +49 234 32 14984
Email: Alexander Hartmaier
ORCID ID: 0000-0002-3710-1169
Research Interests:
Micromechanical simulation
Prediction of macroscopic materials behaviour
Dislocation dynamics
Large-scale atomistic simulation
- A. Biswas, M. Ramaswamy Guru Prasad, N. Vajragupta, A. Hartmaier.
Kanapy: Synthetic polycrystalline microstructure generator with geometry and texture, Zenodo, (2020)
- A. Biswas, N. Vajragupta, R. Hielscher, A. Hartmaier.
Optimized reconstruction of the crystallographic orientation density function based on a reduced set of orientations, Journal of Applied Crystallography, International Union of Crystallography, 53, 178-187, (2020)
- S. Gao, M. A. Ali, A. Hartmaier.
Influence of rafted microstructures on creep in Ni-base single crystal superalloys: a 3D discrete dislocation dynamics study, Modelling and Simulation in Materials Science and Engineering, 28, 025001, (2019)
- D.Matschkal-Amberger, M.Kolb, S. Neumeier, S. Gao et al.
New flat-punch indentation creep testing approach for characterizing the local creep properties at high temperatures, Materials & Design, 183, 108090, (2019)
- W. Amin, M. A. Ali, N. Vajragupta, A. Hartmaier.
Studying grain boundary strengthening by dislocation-based strain gradient crystal plasticity coupled with a multi-phase-field model, Materials, MDPI, Basel, Switzerland, 12, 2977, (2019)
- D. Reimann, K. C. Nidadavolu, H. u. Hassan, N. Vajragupta et al.
Modeling macroscopic material behavior with machine learning algorithms trained by micromechanical simulations, Frontiers in Materials, 6, 1-19, (2019)
- Liu, Lei, Z. Xu, Tian, Dongyu, A. Hartmaier et al.
MD simulation of stress-assisted nanometric cutting mechanism of 3C silicon carbide, Industrial Lubrication and Tribology, 71, 686-691, (2019)
- A. Biswas, Mahesh Prasad, N. Vajragupta, H. u. Hassan et al.
Influence of microstructural features on the strain hardening behavior of additively manufactured metallic components, Advanced Engineering Materials, Wiley Online Library, Germany, 1900275, 1900275, (2019)
- S. Gao, Z. Yang, M. Grabowski, J. Rogal et al.
Influence of excess volumes induced by Re and W on dislocation motion and creep in Ni-base single crystal superalloys: a 3D discrete dislocation dynamics study, Metals, 9, 637, (2019)
- H. M. Sajjad, S. Hanke, Sedat Güler , H. u. Hassan et al.
Modelling cyclic behaviour of martensitic steel with J2 plasticity and crystal plasticity, Journal of Materials MDPI, MDPI, Basel, Switzerland, 12, 16, (2019)
- Z. Wang, Haijun Zhang, Zengqiang Li, Guo Li et al.
Crystal plasticity finite element simulation and experiment investigation of nanoscratching of single crystalline copper, Wear, Elsevier, 430-431, 100-107, (2019)
- Benjamin Josef Schäfer, Xiaochen Song , Petra Sonnweber-Ribic, H. u. Hassan et al.
Micromechanical modelling of the cyclic deformation behavior of martensitic SAE 4150—a comparison of different kinematic hardening models, Metals, 9(3), 368, (2019)
- A. P. A. Subramanyam, A. Azócar Guzmán, S. Vincent, A. Hartmaier et al.
Ab initio study of the combined effects of alloying elements and H on grain boundary cohesion in ferritic steels, Metals, 9, 291, (2019)
- Zhanfeng Wang, Junjie Zhang, Zongwei Xu, Jianguo Zhang et al.
Crystal plasticity finite element modeling and simulation of diamond cutting of polycrystalline copper, Journal of Manufacturing Processes, Elsevier, 38, 187-195, (2019)
- K. Bonnekoh, U. Jäntsch, J. Hoffmann, H. Leiste et al.
The brittle-to-ductile transition in cold rolled tungsten plates: Impact of crystallographic texture, grain size and dislocation density on the transition temperature, International Journal of Refractory Metals and Hard Materials, 78, 146-163, (2019)
- S. Gupta, A. Ma, A. Hartmaier.
Mechanical twinning induced alteration in the kinetics of martensitic phase transformation in TRIP-maraging steels, International Journal of Solids and Structures, Elsevier, 155, 213-224, (2018)
- J. Möller, E. Bitzek, R. Janisch, H. ul Hassan et al.
Fracture ab initio: A force-based scaling law for atomistically informed continuum models, Journal of Materials Research, 33, 3750 - 3761, (2018)
- H. u. Hassan, K. Govind, A. Hartmaier.
Micromechanical modelling of coupled crystal plasticity and hydrogen diffusion, Philosophical Magazine, tandfonline, 99, 92-115, (2018)
- J. K. Engels, S. Gao, W. Amin, A. Biswas et al.
Indentation size effects in spherical nanoindentation analyzed by experiment and non-local crystal plasticity, Materialia, 3, 21-30, (2018)
- Z. Wang, J. Zhang, H. u. Hassan, J. Zhang et al.
Coupled effect of crystallographic orientation and indenter geometry on nanoindentation of single crystalline copper, International Journal of Mechanical Sciences, 148, 531–539, (2018)
- C. Bonnekoh, U. Jäntsch, J. Hoffmann, H. Leiste et al.
The brittle-to-ductile transition in cold rolled tungsten plates: Impact of crystallographic texture, grain size and dislocation density on the transition temperature, International Journal of Refractory Metals & Hard Materials, Elsevier, 78, 146-163, (2018)
- Z. Xu, Z. He, Y. Song, X. Fu et al.
Topic Review: Application of Raman spectroscopy characterization in micro/nano-machining, Micromechanics, MDPI, Basel, Switzerland, 2018, 361, (2018)
- G. Eggeler, P. Wollgramm, K. Neuking, J. Schreuer et al.
On shear testing of single crystal Ni-base superalloys, Metallurgical and Materials Transactions A, Springer Nature Switzerland AG, Cham (CH), 49, 3951-3962, (2018)
- S. Gao, P. Wollgramm, G. Eggeler, A. Ma et al.
A phenomenological creep model for nickelbase single crystal superalloys at intermediate temperatures, Modelling and Simulation in Materials Science and Engineering, IOP Publishing Ltd, Bristol and Philadelphia, 26, 055001, (2018)
- X. Fu, Z. Xu, Z. He, A. Hartmaier et al.
Molecular dynamics simulation of silicon ion implantation into diamond and subsequent annealing, Nuclear Instruments and Methods in Physics Research B, Elsevier, (2018)
- Z. Zhang, J. Cui, B. Wang, H. Jiang et al.
In situ TEM observation of rebonding on fractured silicon carbide, Nanoscale, The Royal Society of Chemistry. London, UK, 10, 6261-6269, (2018)
- T. Schaffner, A. Hartmaier, V. Kokotin, M. Pohl.
Analysis of hydrogen diffusion and trapping in ultra-high strength steel grades, Journal of Alloys and Compounds, Elsevier B. V., 746, 557-566, (2018)
- S. Gao, U. Gogilan, A. Ma, A. Hartmaier.
Numerically efficient microstructure-based calculation of internal stresses in superalloys, Modelling and Simulation in Materials Science and Engineering, IOP Publishing Ltd, Bristol and Philadelphia, 26, 025001, (2017)
- N. Vajragupta, H. u. Hassan, A. Hartmaier.
Towards prediction of springback in deep drawing using a micromechanical modeling scheme, Procedia Engineering, 207, 60-65, (2017)
- M. Boeff, H. u. Hassan, A. Hartmaier.
Micromechanical modeling of fatigue crack initiation in polycrystals, Journal of Materials Research, 32, 4375-4386, (2017)
- N. Vajragupta, S. Ahmed, M. Boeff, A. Ma et al.
Micromechanical modeling approach to derive the yield surface for BCC and FCC steels using statistically informed microstructure models and nonlocal crystal plasticity, Physical Mesomechanics, 20, 100-108, (2017)
- M. Kanani, A. Hartmaier, R. Janisch.
The shear instability energy: A new parameter for materials design?, Modelling and Simulation in Materials Science and Engineering, IOP Publishing Ltd, Bristol and Philadelphia, 25, 075009, (2017)
- M. Kulosa, M. Neumann, M. Boeff, G. Gaiselmann et al.
A study on microstructural parameters for the characterization of granular porous ceramics using a combination of stochastic and mechanical modeling, International Journal of Applied Mechanics, 09, 1750069, (2017)
- J. Zhang, A. Hartmaier, T. Sun, et al.
Interaction between phase transformations and dislocations at incipient plasticity of monocrystalline silicon under nanoindentation, Computational Materials Science, Elsevier B.V., 131, 55 - 61, (2017)
- A. Hartmaier.
Vom Atom zum Bauteil und zurück, Physik in unserer Zeit, Wiley-VCH, Weinheim, 48, 190-197, (2017)
- S. Gao, M. Fivel, A. Ma, A. Hartmaier.
3D discrete dislocation dynamics study of creep behavior in Ni-base single crystal superalloys by a combined dislocation climb and vacancy diffusion model, Journal of the Mechanics and Physics of Solids, Elsevier B. V., 102, 209-223, (2017)
- A. Ma, A. Hartmaier.
A crystal plasticity smooth-particle hydrodynamics approach and its application to equalchannel angular pressing simulation, Modelling and Simulation in Materials Science and Engineering, 24, 085011, (2016)
- H. u. Hassan, F. Maqbool, A. Güner, A. Hartmaier et al.
Springback prediction and reduction in deep drawing under influence of unloading modulus degradation, International Journal of Material Forming, 9, 619–633, (2016)
- R. Scholz, R.-M. Mittendorf, J. K. Engels, A. Hartmaier et al.
Direction-dependent mechanical characterization of cellulose-based composite vulcanized fiber, Materials Testing, 58, 813-817, (2016)
- R. Sivanesapillai, N. Falkner, A. Hartmaier, H. Steeb.
A CSF-SPH method for simulating drainage and imbibition at pore-scale resolution while tracking interfacial areas, Advances in Water Resources, 1, 212-234, (2016)
- E. Borukhovich, G. Du, M. Stratmann, M. Boeff et al.
Microstructure design of tempered martensite by atomistically informed full-field simulation: From quenching to fracture, Materials, 9, 673, (2016)
- B. Reinholz, S. Brinckmann, A. Hartmaier, B. Muntifering et al.
Influence of the twin microstructure on the mechanical properties in magnetic shape memory alloys, Acta Materialia, 108, 197-206, (2016)
- M. Kanani, A. Hartmaier, R. Janisch.
Stacking fault based analysis of shear mechanisms at interfaces in lamellar TiAl alloys, Acta Materialia, 106, 208-218, (2016)
- X. Pang, R. Janisch, A. Hartmaier.
Interplanar potential for tension-shear coupling at grain boundaries derived from ab initio calculations, Modelling and Simulation in Materials Science and Engineering, 24, 015007, (2016)
- M. Boeff, F. Gutknecht, P. S. Engels, A. Ma et al.
Formulation of nonlocal damage models based on spectral methods for application to complex microstructures, Engineering Fracture Mechanics, 147, 373-387, (2015)
- T. Wang, C. Begau, G. Sutmann, A. Hartmaier.
Large scale molecular dynamics simulation of microstructure formation during thermal spraying of pure copper, Surface and Coatings Technology, 280, 72-80, (2015)
- S. Gao, M. K. Rajendran, M. Fivel, A. Ma et al.
Primary combination of phase-field and discrete dislocation dynamics methods for investigating athermal plastic deformation in various realistic Ni-base single crystal superalloy microstructures, Modelling and Simulation in Materials Science and Engineering, 23, 075003, (2015)
- J. Zhang, C. Begau, L. Geng, A. Hartmaier.
Atomistic investigation of wear mechanisms of a copper bi-crystal, Wear, 332-333, 941-948, (2015)
- S. Gupta, A. Ma, A. Hartmaier.
Investigating the influence of crystal orientation on bending size effect of single crystal beams, Computational Materials Science, 101, 201-210, (2015)
- S. Gao, M. Fivel, A. Ma, A. Hartmaier.
Influence of misfit stresses on dislocation glide in single crystal superalloys: A three-dimensional discrete dislocation dynamics study, Journal of the Mechanics and Physics of Solids, 76, 276-290, (2015)
- A. Ma, A. Hartmaier.
A study of deformation and phase transformation coupling for TRIP-assisted steels, International Journal of Plasticity, 64, 40-55, (2015)
- N. Vajragupta, P. Wechsuwanmanee, J. Lian, M. Sharaf et al.
The modeling scheme to evaluate the influence of microstructure features on microcrack formation of DP-steel: the artificial microstructure model and its application to predict the strain hardening behavior, Computational Materials Science, 95, 198-213, (2014)
- M. Sharaf, P. Kucharczyk, N. Vajragupta, S. Münstermann et al.
Modeling the microstructure influence on fatigue life variability in structural steels, Computational Materials Science, 94, 258-272, (2014)
- M. Kanani, A. Hartmaier, R. Janisch.
Interface properties in lamellar TiAl microstructures from density functional theory, Intermetallics, ELSEVIER, 54, 154-163, (2014)
- K. Chockalingam, R. Janisch, A. Hartmaier.
Coupled atomistic-continuum study of the effects of C atoms at α-Fe dislocation cores, Modelling and Simulation in Materials Science and Engineering, 22, 075007, (2014)
- M. Boeff, A. Ma, A. Hartmaier.
Plastic deformation modelling of tempered martensite steel block structure by a nonlocal crystal plasticity model, Theoretical and Applied Mechanics Letters, 4, 051007, (2014)
- R. Sivanesapillai, H. Steeb, A. Hartmaier.
Transition of effective hydraulic properties from low to high Reynolds number flow in porous media, Geophysical Research Letters, John Wiley & Sons, 41, 4920-4928, (2014)
- A. M. Tahir, R. Janisch, A. Hartmaier.
Hydrogen embrittlement of a carbon segregated Σ5(310)[001] symmetrical tilt grain boundary in α-Fe, Material Science and Engineering A, 612, 462-467, (2014)
- T. Wang, G. Madsen, A. Hartmaier.
Atomistic study of the influence of lattice defects on the thermal conductivity of silicon, Modelling and Simulation in Materials Science and Engineering, 22, 035011, (2014)
- C. Begau, A. Hartmaier.
Microstructural characterization of shape memory alloys on the atomic scale, TMS 2014 Supplemental Proceedings, John Wiley & Sons, Inc., 247-256, (2014)
- A. Ma, A. Hartmaier.
On the influence of isotropic and kinematic hardening caused by strain gradients on the deformation behaviour of polycrystals, Philosophical Magazine, Taylor & Francis, 94, 125-140, (2014)
- P. S. Engels, C. Begau, S. Gupta, B. Schmaling et al.
Multiscale modelling of nanoindentation: from atomistic to continuum models, Nanomechanical analysis of high performance materials, Springer Science + Business Media, Dordrecht, 203, 285-322, (2014)
- A. M. Tahir, R. Janisch, A. Hartmaier.
Ab initio calculation of traction separation laws for a grain boundary in molybdenum with segregated C impurites, Modelling and Simulation in Materials Science and Engineering, 21, 16, (2013)
- J. Zhang, A. Hartmaier, Y. Wei, Y. Yan et al.
Mechanisms of anisotropic friction in nanotwinned Cu revealed by atomistic simulations, Modelling and Simulation in Materials Science and Engineering, 21, 16, (2013)
- J. Pfetzing-Micklich, C. Somsen, A. Dlouhy, C. Begau et al.
On the crystallographic anisotropy of nanoindentation in pseudoelastic NiTi, Acta Materialia, 61, 602-616, (2013)
- P. S. Engels, A. Ma, A. Hartmaier.
Continuum simulation of the evolution of dislocation densities during nanoindentation, International Journal of Plasticity, 38, 159-169, (2012)
- D. K. Mahajan, A. Hartmaier.
Mechanisms of crazing in glassy polymers revealed by molecular dynamics simulations, Physical Review E, 86, 021802, (2012)
- X. Pang, N. Ahmed, R. Janisch, A. Hartmaier.
The mechanical shear behavior of Al single crystals and grain boundaries, Journal of Applied Physics, 112, 023503, (2012)
- J. Zhang, T. Sun, A. Hartmaier, Y. Yan.
Atomistic simulation of the influence of nanomachining-induced deformation on subsequent nanoindentation, Computational Materials Science, 59, 14-21, (2012)
- A. Köster, A. Ma, A. Hartmaier.
Atomistically informed crystal plasticity model for body-centered cubic iron, Acta Materialia, 60, 3894–3901, (2012)
- N. Vajragupta, V. Uthaisangsuk, B. Schmaling, S. Münstermann et al.
A micromechanical damage simulation of dual phase steels using XFEM, Computational Materials Science, 54, 271-279, (2012)
- J. Zhang, W. Yujie, S. Tao, A. Hartmaier et al.
Twin boundary spacing-dependent friction in nanotwinned copper, Physical Review B, 85, 5, (2012)
- A. Ma, A. Hartmaier.
Scale bridging modeling of plastic deformation and damage initiation in polycrystals, Polycrystalline materials - theoretical and practical aspects, InTech, Rijeka, Croatia, 3-26, (2012)
- B. Schmaling, A. Hartmaier.
Determination of plastic material properties by analysis of residual imprint geometry of indentation, Journal of Materials Research, Cambridge University Press, Cambridge, 27, 2167-2177, (2012)
- S. Brinckmann, D. K. Mahajan, A. Hartmaier.
A scheme to combine molecular dynamics and dislocation dynamics , Modelling and Simulation in Materials Science and Engineering, 20, 045001, (2012)
- C. Begau, J. Hua, A. Hartmaier.
A novel approach to study dislocation density tensors and lattice-rotation patterns in atomistic simulations, Journal of the Mechanics and Physics of Solids, 60, 711-722, (2012)
- S. Brinckmann, R. Sivanesapillai, A. Hartmaier.
On the formation of vacancies by edge dislocation dipole annihilation in fatigued copper, International Journal of Fatigue, 33, 1369-1375, (2011)
- N. Ahmed, A. Hartmaier.
Mechanisms of grain boundary softening and strain-rate sensitivity in deformation of ultrafine-grained metals at high temperatures, Acta Materialia, Elsevier Ltd., Munich, 59, 4323-4334, (2011)
- M. Lodes, A. Hartmaier, M. Göken, K. Durst.
Influence of dislocation density on the pop-in behavior and indentation size effect in CaF(2) single crystals: Experiments and molecular dynamics simulations, Acta Materialia, 59, 4264-4273, (2011)
- J. Pfetzing-Micklich, S. Brinckmann, S.J. Dey, F. Otto et al.
Micro-shear deformation of pure copper, Materialwissenschaft und Werkstofftechnik, 42, 219-223, (2011)
- M. Prechtel, P. Leiva-Ronda, R. Janisch, A. Hartmaier et al.
Simulation of fracture in heterogeneous elastic materials with cohesive zone models, International Journal of Fracture, 168, 15-29, (2011)
- C. Begau, A. Hartmaier, E.P. George, G.M. Pharr.
Atomistic processes of dislocation generation and plastic deformation during nanoindentation, Acta Materialia, 59, 934-942, (2011)
- E. Hristova, R. Janisch, R. Drautz, A. Hartmaier.
Solubility of carbon in α-iron under volumetric strain and close to the Σ5(310)[001] grain boundary: Comparison of DFT and empirical potential methods, Computational Materials Science, 50, 1088-1096, (2011)
- N. Ahmed, A. Hartmaier.
A two-dimensional dislocation dynamics model of the plastic deformation of polycrystalline metals, Journal of the Mechanics and Physics of Solids, 58, 2054-2064, (2010)
- R. Darvishi Kamachali, J. Hua, I. Steinbach, A. Hartmaier.
Multiscale simulations on the grain growth process in nanostructured materials, International Journal of Materials Research, 11, 1332-1338, (2010)
- J. Hua, A. Hartmaier.
Determining Burgers vectors and geometrically necessary dislocation densities from atomistic data, Modelling and Simulation in Materials Science and Engineering, 18, 045007, (2010)
- R. Janisch, N. Ahmed, A. Hartmaier.
Ab initio tensile tests of Al bulk crystals and grain boundaries: universality of mechanical behaviour, Physical Review B, 81, 184108, (2010)
- G. Ziegenhain, H. M. Urbassek, A. Hartmaier.
Influence of crystal anisotropy on elastic deformation and onset of plasticity in nanoindentation: A simulational study, Journal of Applied Physics, 107, 061807, (2010)
- J. Pesicka, A. Aghajani, C. Somsen, A. Hartmaier et al.
How dislocation substructures evolve during long-term creep of a 12% Cr tempered martensitic ferritic steel, Scripta Materialia, 62, 353-356, (2010)
- I. Steinbach, X. Song, A. Hartmaier.
Phase-field model with plastic flow for grain-growth in nanocrystalline material, Philosophical Magazine, 90, 485-499, (2010)
- B. Schmaling, A. Ma, A. Hartmaier.
Transformation induced plasticity modelling based on micromechanical approaches, MMM 2010 Conference Proceedings, MMM, 532-535, (2010)
- A. Shaban, A. Ma, A. Hartmaier.
Polycrystalline material deformation modeling with grain boundary sliding and damage accumulation, Proceedings of 18th European Conference on Fracture (ECF18), European Structural Integrity Society (ESIS), 250-257, (2010)
- B. Eidel, A. Hartmaier, P. Gumbsch.
, Multiscale modelling of plasticity and fracture by means of dislocation mechanics, CISM International Centre for Mechanical Sciences, Courses and Lectures, Springer-Verlag, Stuttgart, 522, 1-58, (2010)
- J. Hua, A. Hartmaier.
Development of a method to determine Burgers vectors from atomistic data, Journal of Physics: Conference Series, 240, 012010, (2010)
- X. Zeng, A. Hartmaier.
Modeling size effects on fracture toughness by dislocation dynamics, Acta Materialia, 58, 301-310, (2010)
- G. Ziegenhain, A. Hartmaier, H. M. Urbassek.
Pair vs many-body potentials: influence on elastic and plastic behavior in nanoindentation of fcc metals, Journal of the Mechanics and Physics of Solids, 57, 1514–1526 , (2009)
- P. Armstrong, C. Knieke, M. Mackovic, G. Frank et al.
Microstructural evolution during deformation of tin dioxide nanoparticles in a comminution process, Acta Materialia, 57, 3060–3071, (2009)
- A. Böhner, R. Janisch, A. Hartmaier.
Ab initio investigation of diamond coatings on steel , Scripta Materialia, 60, 504-507, (2009)
- K. Higashida, M. Tanaka, A. Hartmaier, Y. Hoshino.
Analyzing crack-tip dislocations and their shielding effect on fracture toughness, Materials Science and Engineering, A 483, 13-18, (2008)
- D. Rupp, X. Zeng, S.M. Weygand, A. Hartmaier.
Loading rate dependence of the fracture toughness of polycrystalline tungsten in the brittle and semi-brittle regime: experiments and modelling, Proceedings of 17th European Conference on Fracture (ECF17), 667, (2008)
- N. C. Broedling, A. Hartmaier, H. Gao.
Fracture toughness of layered structures: Embrittlement due to confinement of plasticity , Engineering Fracture Mechanics, 75, 3743-3754 , (2008)
- N. C. Broedling, A. Hartmaier, M. J. Buehler, H. Gao.
The strength limit in a bio-inspired metallic nanocomposite, Journal of the Mechanics and Physics of Solids, 56, 1086-1104 , (2008)
- M. Tanaka, Y. Hoshino, A. Hartmaier, K. Higashida.
Crack tip dislocations and its shielding effect, Materials Science Forum, 561-565, 1833-1836, (2008)
- N. C. Broedling, A. Hartmaier, H. Gao.
A combined dislocation - cohesive zone model for fracture in a confined ductile layer, International Journal of Fracture, 140, 169-181, (2006)
- C. S. Han, A. Hartmaier, H. Gao, Y. G. Huang.
Discrete dislocation dynamics simulations of surface induced size effects in plasticity, Materials Science and Engineering, A 415, 225-233, (2006)
- M. J. Buehler, A. Hartmaier, M. Duchaineau, F. F. Abraham et al.
The dynamical complexity of work-hardening: a large-scale molecular dynamics simulation , Acta Mechanica Sinica, 21, 103-111, (2005)
- A. Hartmaier, M. J. Buehler, H. J. Gao.
Two-dimensional discrete dislocation models of deformation in polycrystalline thin metal films on substrates, Materials Science and Engineering A, 400-401, 260-263 , (2005)
- A. Hartmaier, M. J. Buehler, H. J. Gao.
Multiscale modeling of deformation in polycrystalline thin metal films on substrates, Advanced Engineering Materials, 7, 165-169 , (2005)
- A. Hartmaier, P. Gumbsch.
Thermal activation of crack-tip plasticity: The brittle or ductile response of a stationary crack loaded to failure, Physical Review B, 71, 024108 , (2005)
- M. J. Buehler, A. Hartmaier, H. Gao.
Hierarchical multi-scale modelling of plasticity of submicron thin metal films, Modelling and Simulation in Materials Science and Engineering, 12, S391-S413 , (2004)
- M. J. Buehler, A. Hartmaier, H. Gao.
Hierarchical multi-scale modelling of plasticity of submicron thin metal films, Modelling Simul. Mater. Sci. Eng., 12, 391-413, (2004)
- M. J. Buehler, A. Hartmaier, H. Gao.
Atomic plasticity: description and analysis of a one-billion atom simulation of ductile materials failure, Computer Methods in Applied Mechanics and Engineering, 193, 5257-5282 , (2004)
- A. Hartmaier, X. Ma, H. Gao.
Grain-structure evolution after surface plastic deformation of nanocrystals, Proceedings of the 25th Ris\o{} International Symposium on Materials Science: Evolution of Deformation Microstructures in 3D, Ris\o{} National Laboratory, 323-328, (2004)
- M .J. Buehler, A. Hartmaier, M. Duchaineau, F. F. Abraham et al.
Analysis of a one-billion atom simulation of work-hardening in ductile materials, Nanoscale Materials and Modeling - Relations Among Processing, Microstructure and Mechanical Properties, MRS, 821, 1.2.1-1.2.12, (2004)
- M. J. Buehler, A. Hartmaier, H. Gao.
Constrained grain boundary diffusion in thin copper films, Nanoscale Materials and Modeling-Relations Among Processing, Microstructure and Mechanical Properties, MRS, 821, 8.2.1 - 8.2.6, (2004)
- A. Hartmaier, P. Gumbsch.
Discrete dislocations dynamics simulation of crack-tip plasticity, Continuum Scale Simulation of Engineering Materials: Fundamentals - Microstructures - Process Applications, Wiley-VCH, Weinheim, Germany, 413-428, (2004)
- M. J. Buehler, A. Hartmaier, H. Gao, X. Ma.
A discrete dislocation plasticity model of creep in polycrystalline thin films, Defect and Diffusion Forum, 224-225, 107-128, (2003)
- A. Hartmaier, P. Gumbsch.
Models for fracture toughness in the semi-brittle regime, Recent Developments in the Modelling of Rupture in Solids, ???, 63-68, (2003)
- R. Laternser, H. P. Gänser, L. Taenzer, A. Hartmaier.
Chip formation in cellular materials, Journal of Engineering Materials and Technology, 125, 44-49, (2003)
- M.J. Buehler, A. Hartmaier, H. Gao.
Atomistic and continuum studies of crack-like diffusion wedges and associated dislocation mechanisms in thin films on substrates, Journal of the Mechanics and Physics of Solids, 51, 2105-2125 , (2003)
- M. J. Buehler, A. Hartmaier, H. Gao.
Continuum and atomistic studies of crack-like diffusion wedges, Multiscale Phenomena in Materials: Experiments and Modeling Related to Mechanical Behavior, 779, W4.7.1, (2003)
- A. Hartmaier, P. Gumbsch.
Scaling relations for crack-tip plasticity, Philosophical Magazine, A 82, 3187-3200, (2000)
- A. Hartmaier, P. Gumbsch, E. Arzt, W. D. Nix.
Modeling work hardening in thin metal films on substrates, Metalle/Simulation Metalle, VI, 541-546, (1999)
- A. Hartmaier, P. Gumbsch.
The brittle-to-ductile transition and dislocation activity at crack tips, Journal of Computer-Aided Materials Design, 6, 145-155, (1999)
- A. Hartmaier, M.C. Fivel, G. R. Canova, P. Gumbsch.
Image stresses in a free-standing thin film, Modelling Simul. Mater. Sci. Eng., 7, 781-793, (1999)
- A. Hartmaier, P. Gumbsch.
Mesoscopic simulation of dislocation activity at crack tips, Fracture and Ductile vs. Brittle Behavior - Theory, Modeling, and Experiment, 539, 233-244, (1999)
- A. Hartmaier, M. C. Fivel, G. R. Canova, P. Gumbsch.
3D discrete dislocation models of thin-film plasticity., Thin Films - Stresses and Mechanical Properties, 505, 539-544, (1998)
- P. Gumbsch, J. Riedle, A. Hartmaier, H.F. Fischermeister.
Controlling factors for the brittle-to-ductile transition in tungsten single crystals, Science, 282, 1293-1295, (1998)
- A. Hartmaier, P. Gumbsch.
On the activation energy for the brittle/ductile transition, Phys. Status Solidi B, 202, R1-R2 , (1997)
- A. Hartmaier, H. M. Urbassek, W. Sack.
Transition flow in an impact pressure probe: Relevance of gas–wall interaction, Physics of Fluids, A9, 1344-1352, (1997)
- 01.09.2019Segregation and embrittlement at grain boundaries in multicomponent steel – insights from ab-initio calculationsRebecca Janisch, Johannes Möller, Erik Bitzek, Hamad ul Hassan, Alexander Hartmaier
EUROMAT 2019 Stockholm, Sweden 01 – 05 September 2019
- 22.08.2019Atomistic aspects of deformation and fractureRebecca Janisch, Johannes Möller, Erik Bitzek, Hamad ul Hassan, Alexander Hartmaier
DCMS MATERIALS 4.0 summer school Deep Mechanics Dresden, Germany 19 - 23 August 2019
- 13.09.2018What does nanoindentation teach us on macroscopic material behaviorAlexander Hartmaier
Indentation 2018 14-18 September 2018 Liège, Belgium,
- 19.09.2017Micromechanical modeling of fatigue crack initiation in aluminium 2024Hamad ul Hassan, Wenye Ye, Alexander Hartmaier
EUROMAT 2017, Thessaloniki, Greece
- 05.09.2017Modelling and experiment of material-oriented micro/nano manufacturingHamad ul Hassan, Martin Boeff, Alexander Hartmaier
Sino-German Symposium: Modeling and Experiment of Material-oriented Micro/Nano Manufacturing, Harbin, China
- 30.08.2017Atomistically informed continuum models for deformation and fracture of materialsAlexander Hartmaier
International Symposium on Multiscale Computational Analysis of Complex Materials, Copenhagen, Denmark
- 20.06.2017Deformation and fracture at grain boundaries: Can we include atomistic effects in mesoscale descriptions via a few physical parameters?Rebecca Janisch, Mansour Kanani, Xueyong Pang, Arshad Mahmood Tahir, Alexander Hartmaier
14th International Conference on Fracture, Ixia, Greece
- 22.05.2017Atomistic origins of deformation at grain boundaries in Al and TiAlRebecca Janisch, Mansour Kanani, Xueyong Pang, Alexander Hartmaier
EMRS Spring Meeting 2017, Strasbourg, France
- 03.05.2017Grain boundary properties: Insights from atomistic simulations and their use in mechanical modeling of materialsRebecca Janisch, Xueyong Pang, Mansour Kanani, Ankit Izardar, Alexander Hartmaier
SFB 986 Materials Science Colloquium, Technical University Hamburg, Germany
- 01.12.2016Virtuelle und reale Härteprüfung: Wie gelingt die Verknüpfung von Experiment und Simulation?Alexander Hartmaier
Tagung Werkstoffprüfung 2016, Neu-Ulm, Germany
- 20.10.2016Atomistically informed continuum models for deformation and fracture of materialsAlexander Hartmaier
MICOS 2016: International Conference on Microscale Morphology of Component Surfaces, TU Kaiserslautern, Germany
- 09.09.2016Ion beam nanofabrication and its applications in nano-optics and bio-sensingZongwei Xu, Fengzhou Fang, Alexander Hartmaier
Special Seminar at Cardiff University, Cardiff, UK
- 28.06.2016Atomistically informed continuum models for plasticity and fractureAlexander Hartmaier
8th International Conference on Materials Structure and Micromechanics of Fracture, Brno, Czech Republic
- 22.06.2016Molecular dynamics simulation of focused Ga ion beam induced nanoscale damage on silicon and its annealing recovery mechanismZongwei Xu, Fengzhou Fang, Yinjing Xiao, Tao Wang, Alexander Hartmaier
EMN 2016: Energy Materials and Nanotechnology, Prague, Czech Republic
- 12.05.2016What does nanoscale testing and modeling teach us on macroscopic material behavior?Alexander Hartmaier
Colloquium of the Department of Materials, University of Oxford, UK
- 02.05.2016Constitutive relationships for grain boundaries from atomistic simulationsRebecca Janisch, Mansour Kanani, Xueyong Pang, Alexander Hartmaier
ICAMS Advanced Discussions 2016, Bochum, Germany
- 02.03.2016Atomistically informed crystal plasticity modelsAlexander Hartmaier
Schöntal Symposium Dislocation-based Plasticity, Schöntal, Germany
- 19.02.2016Advances in scalebridging modeling of deformation and fracture in martensitic steelsAlexander Hartmaier
Colloquium at NTNU Trondheim, Norway, February 19, 2016.
- 30.10.2015Atomistically informed continuum models for plasticity, damage and fracture of martensitic steelsAlexander Hartmaier
International Symposium on Microstructure and Mechanical Properties of Advanced Metallic Materials, Erlangen, Germany
- 06.10.2015Micromechanical modeling (I. heterogeneous materials, II. microstructure evolution)Alexander Hartmaier
French-German Summer School on Evolutionary Solid Bodies, Bollendorf, Germany
- 27.07.2015Microstructure informed constitutive models and their applicationsAnxin Ma, Alexander Hartmaier
Ohio State University, Columbus, USA
- 05.01.2015The higher order nonlocal constitutive model and its application to multiphase materialsAnxin Ma, Alexander Hartmaier
International Symposium of Plasticity 2015, Montego Bay, Jamaica
- 02.01.2015Atomistically informed continuum models for plasticity and fracture of tempered martensiteAlexander Hartmaier, Karthikeyan Chockalingam, Rehman Hameed, Philipp Schwittek, Rebecca Janisch, Anxin Ma
International Symposium of Plasticity 2015, Montego Bay, Jamaica
- 01.10.2014Atomistically informed continuum models for plasticity and fracture of martensitic steelsAlexander Hartmaier, Karthikeyan Chockalingam, Rehman Hameed, Xueyong Pang, Arshad Mahmood Tahir, Rebecca Janisch, Anxin Ma
24th International Workshop on Computational Mechanics of Materials, Madrid, Spain
- 15.07.2014What does nanoscale testing and modeling teach us on macroscopic material behavior?Alexander Hartmaier
Gordon Research Conference on Thin Films and Small Scale, Boston, USA
- 03.12.2013Micromechanical modelling of multiphase steelsRehman Hameed, Aenne Köster, Anxin Ma, Alexander Hartmaier
THERMEC 2013, Las Vegas, USA
- 14.10.2013Atomistically informed crystal plasticity model for bcc ironAlexander Hartmaier
Workshop "Plasticity and Crack Initiation in Steels", Leoben, Austria
- 09.10.2013Effect of substrate topography on adhesion properties of polymer coatingsDhiraj Kumar Mahajan, Fathollah Varnik, Alexander Hartmaier
Sitzung DGM-Fachausschuss „Hybride Werkstoffe und Strukturen“, Kaiserslautern, Germany
- 04.10.2013Numerical simulation of cyclic microcrack growth capability using a crystal plasticity based material model and its experimental validationMohamed Sharaf, Pawel Kucharczyk, Napat Vajragupta, Sebastian Münstermann, Alexander Hartmaier, Wolfgang Bleck
23rd International Workshop on Computational Mechanics of Materials (IWCMM), Singapore
- 26.06.2013Atomistically informed continuum models for fractureAlexander Hartmaier, Arshad Mahmood Tahir, Rebecca Janisch
AK Mikrostrukturmechanik, Hochschule Osnabrück, Osnabrück, Germany
- 11.04.2013Atomistically informed continuum models for plasticity and failure of metalsAlexander Hartmaier
KU Leuven, Leuven, Belgium
- 14.02.2013High-performance computing in materials science: current applications and challengesAlexander Hartmaier
Festcolloquium zur JUQUEEN-Einweihung, Foschungszentrum Jülich, Jülich, Germany
- 22.01.2013Atomistic and continuum modelling of phase transformationsAlexander Hartmaier, Christoph Begau, Aenne Köster, Anxin Ma
International workshop "Nanostructured titanium based alloys for medical applications", Ein Gedi, Israel
- 16.01.2013Mikrostrukturentwicklung bei plastischer Verformung: Atomistische und kontinuumsmechanische ModellierungAlexander Hartmaier, Christoph Begau, Aenne Köster, Anxin Ma
SFB 926–Kolloquium, Kaiserslautern, Germany
- 30.11.2012Atome, Kristalle, Werkstoffe: Skalenüberbrückende Modellierung in der WerkstoffmechanikAlexander Hartmaier
VDI Materials Day, Osnabrück, Germany
- 26.03.2012Modeling phase transformations during mechanical loadingAlexander Hartmaier, Christoph Begau, Aenne Köster
GAMM, Darmstadt, Germany
- 05.03.2012Large-scale molecular dynamics studies of dislocation dynamics, plasticity and fracture of materialsAlexander Hartmaier
Winter School, Forschungszentrum Jülich, Germany
- 06.01.2012Micromechanical modelling of mechanical properties of multiphase materialsAlexander Hartmaier
International Symposium on Plasticity, San Juan, Puerto Rico
- 20.06.2011Modeling phase transformations during mechanical loadingAlexander Hartmaier, Christoph Begau, Benjamin Schmaling, Anxin Ma
3rd Sino German Symposium 2011, Xi'an, China
- 11.05.2011Atomistic modeling of deformation of shape memory alloys: influence of crystal orientationAlexander Hartmaier, Christoph Begau
8th Workshop on Advanced Intermetallic and Metallic Materials, Changsha, China
- 10.05.2011Atoms, crystals, materials: multiscale modeling of mechanical material behaviorAlexander Hartmaier
Colloquium at Harbin Institute of Technology, Harbin, China
- 19.04.2011Atome, Kristalle, Werkstoffe: Skalenüberbrückende Modelle in der WerkstoffmechanikAlexander Hartmaier
Karlsruher Werkstoffkolloquium, Karlsruhe, Germany
- 30.03.2011Modellierung von Schädigung und Bruch in mehrphasigen GefügenAlexander Hartmaier
10. Tagung Gefüge und Bruch, Bochum
- 21.12.2010Atome, Kristalle, Werkstoffe: Skalenüberbrückende Modellierung des MaterialverhaltensAlexander Hartmaier
Physikalisches Kolloquium, TU Dresden, Dresden, Germany
- 01.12.2010Atomistically informed continuum models for deformation and failure of multiphase steelsAlexander Hartmaier, Aenne Köster, Anxin Ma
Materials Research Society (MRS) Fall Meeting 2010, Boston, USA
- 25.10.2010Scale-bridging modelling of mechanical properties of interfacesAlexander Hartmaier, Rebecca Janisch
468. Wilhelm und Else Heraeus-Seminar "Ab initio Description of Iron and Steel: Mechanical properties", Ringberg Castle, Tegernsee, Germany
- 04.10.2010Influence of mechanical stresses on grain growth mechanisms in nanocrystalline materialsIngo Steinbach, Reza Darvishi Kamachali, Jun Hua, Alexander Hartmaier
Fifth International Conference on Multiscale Materials Modeling (MMM2010), Freiburg, Germany
- 23.09.2010Mikromechanische ModellierungAlexander Hartmaier
SZMF (Salzgitter Mannesmann Forschung) Summerschool Duisburg, Germany
- 23.03.2010Dislocation dynamics models of deformation of ultra-fine-grained metalsAlexander Hartmaier, Naveed Ahmed
DGM - Arbeitskreis Mikrostrukturmechanik, Aachen, Germany
- 03.03.2010Vorhersage von Werkstoffeigenschaften durch skalenüberbrückende ModellierungAlexander Hartmaier
DGM Strategieworkshop 'Modern Metals' Bonn, Germany
- 02.02.2010Verformung und Bruch von Grenzflächen-dominierten WerkstoffenAlexander Hartmaier
Kolloquium des Instituts für Werkstofftechnik, Universität Siegen, Siegen, Germany
- 30.11.2009Deformation of ultra-fine-grained and nanocrystalline metals: role of dislocation-grain boundary interaction Alexander Hartmaier, Rebecca Janisch, Naveed Ahmed, Xiaohui Zeng
Fall Meeting of the Materials Research Society (MRS), Boston (MA), USA
- 12.10.2009Probing mechanical properties of interfaces with nanoindentation: results of large scale atomistic simulations Alexander Hartmaier
ECI Conference on Nanomechanical Testing 2009, Barga, Italy
- 16.08.2009Deformation and failure of interface-dominated materials Alexander Hartmaier
International Conference on the Strength of Materials, Dresden, Germany
- 07.07.2009Idee und Wirklichkeit: Wie helfen Computersimulationen bei der Werkstoffentwicklung? Alexander Hartmaier
Physikalisches Kolloquium der Fakultät Physik und Astronomie, Ruhr-Universität Bochum, Germany
- 19.06.2009Idea and reality: computer simulations as a tool for material design Alexander Hartmaier
Science College of the RUB Research School, Ruhr-Universität Bochum, Germany
- 24.05.2009Multiscale simulation and experimental investigation of grain growth in nanocrystalline metals.Ingo Steinbach, Alexander Hartmaier
Asia Steel Conference, Busan, South Korea
- 12.05.2009Interdisciplinary Centre for Advanced Materials Simulation – Multiscale modelling of mechanical properties of materials Alexander Hartmaier
Committee On Technology Meeting (TechCo-41), Düsseldorf, Germany
- 05.03.2009Skalenübergreifende Modellierung von Verformung und Bruch von Grenzflächen-dominierten Materialien Alexander Hartmaier
Forschungszentrum Jülich, Germany
- 16.02.2009Skalenüberbrückende Werkstoffmodellierung: Stand der Wissenschaft und Anwendbarkeit in der Praxis Alexander Hartmaier
TU Chemnitz, Germany
- 15.01.2009Idea and reality: how computer simulations support the design of new materials? Alexander Hartmaier
Faculty of Chemistry, Ruhr-Universität Bochum, Germany
- 06.01.2009Dislocations and grain boundaries: how do nanomaterials deform? Alexander Hartmaier
International Conference on Plasticity, St. Thomas (VI), USA
- 04.01.2009Large-scale atomistic simulations of deformation induced grain growth and grain refinementAlexander Hartmaier
International Conference on Plasticity, St. Thomas (VI), USA
- 07.11.2008Scale-bridging modeling of deformation and failure mechanisms in nanostructured metalsAlexander Hartmaier
Materials Modelling Lab Seminar, Oxford University, Oxford, UK
- 31.10.2008Idee und Wirklichkeit: Wie helfen Computersimulationen bei der Werkstoffentwicklung?Alexander Hartmaier
Physikalisches Kolloquium der Fakultät Physik und Astronomie, Bochum
- 02.09.2008Strain rate dependence of the fracture toughness of polycrystalline tungsten in the brittle and semi-brittle regime: experiments and modellingXiaohui Zeng, Alexander Hartmaier
17th European Conference on Fracture, 2008, Brno, Czech Republic
- 01.09.2008Determination of burgers vectors from atomistic dataJun Hua, Alexander Hartmaier
Materials Science and Engineering 2008, Nürnberg
- 01.09.20082D-dislocation dynamics study of plasticity in ultra fine grained metalsNaveed Ahmed, Alexander Hartmaier
Materials Science and Engineering 2008, Nürnberg, Germany
- 01.09.2008Modelling size effect on fracture toughness in semi-brittle crystals by dislocation dynamicsXiaohui Zeng, Alexander Hartmaier
Materials Science and Engineering 2008, Nürnberg
- 01.09.2008Ab initio study of the ternary layered system Ti-Al-CRebecca Janisch, Alexander Hartmaier
Materials Science and Engineering 2008, Nürnberg
- 04.09.2008CVD-diamond coatings on heat-treatable steels – experimental and computational Investigation of the adhesive layer system Cr/CrxCy/diamondAndreas Böhner, Rebecca Janisch, Alexander Hartmaier, Karsten Kellermann, Stefan Rosiwal, Robert Singer, Karsten Durst, Jens Schaufler, Mathias Göken
Materials Science and Engineering 2008, Nürnberg, Germany
- 25.08.2008Micromechanical modelling of macroscopic material behaviourAlexander Hartmaier
3rd Computational Materials Science Workshop, Ebernburg, Bad Münster am Stein
- 30.06.2008Interfacial strength: ab-initio calculation of cohesive zone parametersAlexander Hartmaier, Rebecca Janisch
8th World Congress on Computational Mechanics WCCM8, Venice, Italy
- 11.06.2008Multiscale simulation of deformation and failure mechanisms in nanostructured materialsAlexander Hartmaier
Seminar of Institute of High-Performance Computing, Singapore
- 02.06.2008Large-Scale atomistic simulations of nanoindentation: Dislocation structures and size effectsAlexander Hartmaier
Materialwissenschaftliches Kolloquium, TU Darmstadt
- 30.03.2008Are atomistic simulations with millions of atoms useful for solid mechanics?Alexander Hartmaier
Mechanics of Time Dependent Materials Conference, Monterey, California, USA
- 02.12.2019Creep and strengthening through interfaces explained by dislocation-based strain-gradient crystal plasticity-phase field methodWaseem Amin, Muhammad Adil Ali, Alexander Hartmaier, Ingo Steinbach
MRD's 2nd Young Materials Researchers Day Ruhr-Universität Bochum
- 05.08.2019Atomistic simulation of fracture in lamellar TiAl microstructuresAnupam Neogi, Alexander Hartmaier, Rebecca Janisch
ISAM4-2019: The fourth International Symposium on Atomistic and Multiscale Modeling of Mechanics and Multiphysics (IIS UTokyo SYMPOSIUM No. 101), August 5-8, 2019, Friedrich-Alexander Universität Erlangen-Nürnberg (FAU), Germany
- 12.06.2019Fracture ab initio: A force-based scaling law for atomistically informed continuum modelsRebecca Janisch, Johannes Möller, Erik Bitzek, Hamad ul Hassan, Alexander Hartmaier
Canadian Materials Science Conference Vancouver, Canada 10. – 13.06.2019
- 02.04.2019Size independent description of the strain effects on the segregation of carbon and hydrogen in ironAbril Azócar Guzmán, Rebecca Janisch, Alexander Hartmaier
DPG Spring Conference Regensburg, Germany 1 - 5 April 2019
- 02.04.2019Partitioning of segregating impurities during grain boundary decohesionRebecca Janisch, Xiang Huang, Alexander Hartmaier
DPG Spring Conference Regensburg, Germany 01 – 05.04.2019
- 19.02.2019Inverse analysis on tempered lath martensite: A materials science and methodological studyJenni Kristin Engels, Napat Vajragupta, Alexander Hartmaier
Nanobrücken 2019 Berlin, Germany 19 - 21 February 2019
- 14.11.2018Application of crystal plasticity finite element method to the modeling of orthogonal cutting processHamad ul Hassan, Zhanfeng Wang, Zongwei Xu, Jianguo Zhang, Alexander Hartmaier, Fengzhou Fang, Yongda Yan, Tao Sun
2nd Materials Chain International Conference 2018, Bochum, Germany
- 12.11.2018Micromechanical modeling of metals using crystal plasticity-phase field methodWaseem Amin, Napat Vajragupta, Alexander Hartmaier
The second Materials Chain International Conference, MCIC 2018 Session: Modelling and Simulation Ruhr-Universität Bochum 12-14 Nov. 2018
- 01.11.2018Atomistically informed mesoscale modeling of fractureHamad ul Hassan, Johannes Möller, Erik Bitzek, Alexander Hartmaier, Rebecca Janisch
18th International conference on the strength of materials (ICSMA) Osaka, Japan
- 27.09.2018Micro-mechanical modelling of additively manufactured 316L stainless steelAbhishek Biswas, Mahesh Ramaswamy Guru Prasad, Hamad ul Hassan, Florian Brenne, Thomas Niendorf, Alexander Hartmaier
Materials Science and Engineering (MSE) Darmstadt, Germany
- 27.09.2018Atomistic simulations of size effects in lamellar TiAl alloysRebecca Janisch, Ashish Chauniyal, Ankit Izardar, Alexander Hartmaier
Materials Science and Engineering (MSE) Darmstadt, Germany
- 27.09.2018Using machine learning methods to homogenise damage from micro- to macroscaleDenise Reimann, Hamad ul Hassan, Tobias Glasmachers, Alexander Hartmaier
Materials Science and Engineering (MSE) Darmstadt, Germany
- 27.09.2018Parameterization of a nonlocal crystal plasticity model for lath martensite using nanoindentationJenni Kristin Engels, Napat Vajragupta, Alexander Hartmaier
Materials Science and Engineering (MSE) Darmstadt, Germany
- 27.09.2018Micromechanical modeling of DP600 steel: From microstructure to the sheet metal forming processNapat Vajragupta, Sascha Maassen, Dominik Brands, Till Clausmeyer, Jörg Schröder, Alexander Hartmaier
Materials Science and Engineering (MSE) Darmstadt, Germany
- 18.09.2018Texture evolution during uniaxial tensile test of additively manufactured 316L stainless steelAbhishek Biswas, Mahesh Ramaswamy Guru Prasad, Napat Vajragupta, Hamad ul Hassan, Florian Brenne, Alexander Hartmaier
6th International Symposium on Computational Mechanics of Polycrystals, Düsseldorf, Germany
- 17.09.2018Synthetic microstructure generation for additively manufactured superalloysMahesh Ramaswamy Guru Prasad, Napat Vajragupta, Alexander Hartmaier
6th International Symposium on Computational Mechanics of Polychrystals, Düsseldorf, Germany
- 27.08.2018Numerical modeling of cyclic nano-indentation using Chaboche material modelHafiz Muhammad Sajjad, Hamad ul Hassan, Alexander Hartmaier
Sino-German Symposium and Summer School, Bochum, Germany
- 23.07.2018Numerically efficient microstructure-based calculation of internal stresses in superalloysSiwen Gao, Umaaran Gogilan, Anxin Ma, Alexander Hartmaier
13th World Congress on Computational Mechanics, New York City, USA
- 18.07.2018A micromechanical modeling scheme to parameterize a loading-path- dependent hardening model for DC06 steelNapat Vajragupta, Srinivas Kamath, Till Clausmeyer, Alexander Hartmaier
18th International Conference on the Strength of Materials, Ohio, USA
- 17.07.2018Numerical modeling of the influence of process conditions on hydrogen transport at microstructural levelHamad ul Hassan, Kishan Govind, Alexander Hartmaier
18th International Conference on the Strength of Materials, Ohio, USA
- 17.07.2018A phenomenological creep model for nickel-base single crystal superalloys at intermediate temperaturesSiwen Gao, Philip Wollgramm, Gunther Eggeler, Anxin Ma, Jürgen Schreuer, Alexander Hartmaier
18th International Conference on the Strength of Materials, Ohio, USA
- 16.07.2018Micromechanical modeling of fatigue crack incubation and small crack growth in polycrystalsHamad ul Hassan, Martin Boeff, Alexander Hartmaier
18th International Conference on the Strength of Materials, Ohio, USA
- 25.06.2018A phenomenological creep model for nickel-base single crystal superalloys at intermediate temperaturesSiwen Gao, Philip Wollgramm, Gunther Eggeler, Anxin Ma, Jürgen Schreuer, Alexander Hartmaier
10 Years ICAMS Ruhr-Universität Bochum, Germany
- 25.06.2018Prediction of large deformations in FCC Metals using crystal platicity phase-field methodWaseem Amin, Napat Vajragupta, Alexander Hartmaier
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany
- 25.06.2018Micromechanical modeling of additively manufactured 316L stainless steelAbhishek Biswas, Mahesh Ramaswamy Guru Prasad, Napat Vajragupta, Hamad ul Hassan, Florian Brenne, Alexander Hartmaier
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany
- 25.06.2018Characterization of tempered lath martensite using nanoindentation and inverse methodJenni Kristin Engels, Napat Vajragupta, Alexander Hartmaier
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany
- 25.06.2018Using machine learning methods to homogenise damage from micro- to macroscaleDenise Reimann, Hamad ul Hassan, Alexander Hartmaier
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany
- 25.06.2018Micromechanical modelling of fatigue simulations using crystal plasticity and finite element methodHafiz Muhammad Sajjad, Hamad ul Hassan, Alexander Hartmaier
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany
- 25.06.2018Micromechanical modelling of hydrogen diffusion in two phase steelMuhammad Ibrar Saleh, Hamad ul Hassan, Alexander Hartmaier
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany
- 25.06.2018Numerical modeling of cyclic nano-indentation using Chaboche material modelHafiz Muhammad Sajjad, Hamad ul Hassan, Alexander Hartmaier
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany
- 03.05.2018Micromechanical modeling of plasticity and damage in realistic microstructuresAlexander Hartmaier
4th Workshop GAMM AG, Data Leuphana Universität, Lüneburg, Germany
- 14.03.2018From inter-atomic forces to stress fields at a crack tip - incorporating the results of atomistic calculations into continuum modelsJohannes Möller, Hamad ul Hassan, Erik Bitzek, Alexander Hartmaier, Rebecca Janisch
DPG Spring Meeting, Berlin, Germany
- 29.08.2018On the application of crystal plasticity finite element method approach to the modeling of wear mechanismsHamad ul Hassan, Zhanfeng Wang, Zongwei Xu, Jianguo Zhang, Alexander Hartmaier, Fengzhou Fang, Yongda Yan, Tao Sun
Sino-German Symposium and Summer School, Bochum, Germany
- 11.12.2017Adressing an indentation size effect (ISE) in the nanoindentation test using a nonlocal crystal plasticity modelJenni Kristin Engels, Napat Vajragupta, Alexander Hartmaier
RUB Materials Day, Ruhr-Universität Bochum, Germany
- 20.09.2017Parameterization of a nonlocal crystal plasticity model by nanoindentation and inverse modelingJenni Kristin Engels, Waseem Amin, Abhishek Biswas, Siwen Gao, Daysi Karina Gonzalez Dacasa, Soheil Rooein, Napat Vajragupta, Alexander Hartmaier
27th International Workshop on Computional Mechanics of Materials (IWCMM27), Leuven, Belgium
- 18.09.2017Towards prediction of springback in deep drawing using a micromechanical modelling schemeNapat Vajragupta, Hamad ul Hassan, Alexander Hartmaier
The 12th International Conference on Technology of Plasticity (ICTP2017), Cambridge, UK
- 06.09.2017Parameterization of a nonlocal crystal plasticity model for tempered martensite by nanoindentation and inverse modellingNapat Vajragupta, Nishant Pillai, Jenni Kristin Engels, Alexander Hartmaier
XIV International Conference on Computational Plasticity. Fundamental and Applications (COMPLAS 2017), Barcelona, Spain
- 05.09.2017Study of the influence of cyclic loading on the surface deformation using micromechanical modeling schemeHamad ul Hassan, Martin Boeff, Alexander Hartmaier
Sino-German Symposium: Modeling and Experiment of Material-oriented Micro/Nano Manufacturing, Harbin, China
- 21.07.2017Micromechanical modeling of fatigue using crystal plasticity finite element methodHamad ul Hassan, Alexander Hartmaier
Haël Mughrabi Honorary Symposium & 28th Colloquium on Fatigue Mechanisms, Erlangen, Germany
- 09.05.2017Towards prediction of springback in deep drawing using a micromechanical modelling schemeNapat Vajragupta, Hamad ul Hassan, Alexander Hartmaier
ICAMS Advanced Discussions, Bochum, Germany
- 09.05.2017Discrete micromehanics and fractureHafiz Muhammad Sajjad, Hamad ul Hassan, Muhammad Ibrar Saleh, Denise Reimann, Alexander Hartmaier
ICAMS Advanced Discussions, Bochum, Germany
- 22.03.2017The shear instability energy as a new parameter to characterise deformation behaviour of materialsRebecca Janisch, Mansour Kanani, Alexander Hartmaier
DPG Spring Meeting, Dresden, Germany
- 20.03.2017Effects of alloying additions on the H embrittlement of a C segregated Σ5 GB in α FeAparna Puchakayala Appaiah Subramanyam, Abril Azócar Guzmán, Rebecca Janisch, Alexander Hartmaier
DPG Spring Meeting, Dresden, Germany
- 03.10.2016Effects of manganese on the hydrogen embrittlement of a Carbon segregated grain boundary in α-FeAparna Puchakayala Appaiah Subramanyam, Rebecca Janisch, Alexander Hartmaier
ADIS 2016, Tegernsee, Germany
- 29.09.2016Micromechanical modeling of hydrogen embrittlement in martensitic steelAlexander Hartmaier, Philipp Schwittek
MSE 2016: Materials Science and Engineering Congress, Darmstadt, Germany
- 28.09.2016Molecular dynamics simulations of nano-indentation in lamellar microstructures of TiAlRebecca Janisch, Aram Asaadi, Ankit Izardar, Alexander Hartmaier
MSE 2016: Materials Science and Engineering Congress, Darmstadt, Germany
- 27.09.2016Shear mechanisms at interfaces in lamellar TiAl alloys from atomistic simulationsRebecca Janisch, Mansour Kanani, Alexander Hartmaier
MSE 2016: Materials Science and Engineering Congress, Darmstadt, Germany
- 14.09.2016Micromechanical modeling of hydrogen embrittlement in martensitic steelAlexander Hartmaier, Philipp Schwittek
International Hydrogen Conference 2016, Grand Teton National Park, USA
- 12.09.2016Ion beam nanofabrication and its applications in bio-sensing & Si/SiC brittle materials’ nanocutting under SEMZongwei Xu, Fengzhou Fang, Alexander Hartmaier
Seminar at Centre for Precision Manufacturing at the University of Strathclyde, Glasgow, UK
- 08.06.2016Diamond cutting tool’s nanofabrication with focused ion beamZongwei Xu, Fengzhou Fang, Alexander Hartmaier
1st International Conference on Helium Ion Microscopy and Emerging Focused Ion Beam Technologies, Luxembourg
- 31.05.2016Constitutive relationships for grain boundaries from atomistic simulations for multiscale mechanical modelling of metallic microstructuresRebecca Janisch, Xueyong Pang, Mansour Kanani, Alexander Hartmaier
Materials Chain International Conference 2016, Bochum, Germany
- 31.05.2016Advances in scalebridging modeling of deformation and fracture in martensitic steelsAlexander Hartmaier
Materials Chain International Conference 2016, Bochum, Germany
- 19.11.2015Atomistic modeling of carbon segregation and its influence on dislocation mobility in ferritic ironHariprasath Ganesan, Christoph Begau, Godehard Sutmann, Alexander Hartmaier
RUB Research Day 2015, Bochum, Germany
- 05.10.2015Free energy function of dislocation densities by large scale atomistic simulationsChristoph Begau, Godehard Sutmann, Alexander Hartmaier
Nanomechanical Testing in Materials Research and Development V, Albufeira, Portugal
- 02.10.2015Interplanar potential for tension-shear coupling at grain boundaries from ab initio calculationsXueyong Pang, Arshad Mahmood Tahir, Rebecca Janisch, Alexander Hartmaier
25th International Workshop on Computational Micromechanics, Bochum, Germany
- 22.09.2015Atomistic modeling of carbon segregation and its influence on dislocation mobility in ferritic ironHariprasath Ganesan, Christoph Begau, Godehard Sutmann, Alexander Hartmaier
Euromat 2015, Warsaw, Poland
- 28.05.2015Characterization of porous ceramics derived from a combination of stochastic and mechanical modelingMatthias Kulosa, Matthias Neumann, Martin Boeff, Gerd Gaiselmann, Volker Schmidt, Alexander Hartmaier
4th International Conference on Material Modeling, Berkeley, USA
- 12.05.2015Influence of misfit stresses on dislocation glide in single crystal superalloys: A three-dimensional discrete dislocation dynamics studySiwen Gao, Marc Fivel, Alexander Hartmaier
12th International Conference on the Mechanical Behavior of Materials, Karlsruhe, Germany
- 12.05.2015Crystal plasticity modeling of porosity reduction in an as-cast Ni-base single crystal superalloy during hot isostatic pressingAnxin Ma, Siwen Gao, Inmaculada Lopez-Galilea, Stephan Huth, Werner Theisen, Alexander Hartmaier
12th International Conference on the Mechanical Behavior of Materials, Karlsruhe, Germany
- 25.03.2015CPFEM modeling of porosity reduction in an as-cast Ni-base single crystal superalloy under HIPAnxin Ma, Inmaculada Lopez-Galilea, Werner Theisen, Alexander Hartmaier
Gordon Research Conference Physical Metallurgy 2015, Maine, USA
- 19.03.2015Shearing behaviour of interfaces: Linking intrinsic properties with deformation mechanismsMansour Kanani, Rebecca Janisch, Alexander Hartmaier
DPG Spring Meeting 2015, Berlin, Germany
- 16.03.2015Hydrogen embrittlement of a carbon segregated symmetrical tilt grain boundary in α-FeArshad Mahmood Tahir, Rebecca Janisch, Alexander Hartmaier
DPG Spring Meeting 2015, Berlin, Germany
- 11.12.20143D discrete dislocation dynamics study of plastic deformation in various Ni-base single crystal superalloy microstructures obtained by phase-field methodSiwen Gao, Mohan Kumar Rajendran, Marc Fivel, Anxin Ma, Oleg Shchyglo, Alexander Hartmaier, Ingo Steinbach
International Workshop on Dislocation Dynamics Simulations: Trends and Challenges Saclay, France
- 03.10.2014The optimum microstructure fatigue resistance: a micromechanical solution to an inferential statistics problemMohamed Sharaf, Sebastian Münstermann, Pawel Kucharczyk, Alexander Hartmaier, Wolfgang Bleck
XXIV International Workshop on Computational Micromechanics of Materials, Madrid, Spain
- 24.09.2014Structural steel endurance: towards the optimum microstructure fatigue resistanceMohamed Sharaf, Sebastian Münstermann, Napat Vajragupta, Pawel Kucharczyk, Alexander Hartmaier, Wolfgang Bleck
Materials Science and Engineering MSE 2014, Darmstadt, Germany
- 24.09.2014Atomistic study of deformation mechanisms in TiAl-Ti3Al lamellar microstructureMansour Kanani, Rebecca Janisch, Alexander Hartmaier
Materials Science and Engineering MSE, Darmstadt, Germany
- 28.08.2014An integrated crystal-plasticity and phase-field simulation frameworkPhilipp Simon Engels, Efim Borukhovich, Ingo Steinbach, Alexander Hartmaier
EMMC14 - European Mechanics of Materials Conference, Gothenburg, Sweden
- 08.07.2014Scalebridging simulation of microstructure and mechanical properties of martensitic steelAlexander Hartmaier, Rehman Hameed, Jenni Kristin Engels, Victoria Yardley
ICAMS Advanced Discussions 2014, Bochum, Germany
- 02.07.2014Application of crystal plasticity to cyclic loadingMartin Boeff, Anxin Ma, Alexander Hartmaier
European Conference on Fracture, Trondheim, Norway
- 11.06.2014The fatigue limit of steel: a numerical solution to the short cracks problemMohamed Sharaf, Napat Vajragupta, Sebastian Münstermann, Pawel Kucharczyk, Alexander Hartmaier, Wolfgang Bleck
The 2nd International Symposium on Fatigue Design & Material Defects, Paris, France
- 03.06.2014Crystal plasticity phase transformation model for metastable austenitic stainless steelSatyapriya Gupta, Anxin Ma, Alexander Hartmaier
3rd international workshop on physics-based models and experimental verification, Cesme, Turkey
- 27.03.2014Steel endurance: from microstructure to fatigue propertiesMohamed Sharaf, Pawel Kucharczyk, Napat Vajragupta, Sebastian Münstermann, Alexander Hartmaier, Wolfgang Bleck
29th Aachen Stahlkolloquium, Aachen, Germany
- 17.03.2014Coupling crystal plasticity and phase-field methodsPhilipp Simon Engels, Efim Borukhovich, Oleg Shchyglo, Anxin Ma, Ingo Steinbach, Alexander Hartmaier
Winter School International Seminar on Process Chain Simulation and Related Topics, Institute of Technology, Karlsruhe, Germany
- 17.03.2014Crystal plasticity phase transformation model for metastable austenitic stainless steelSatyapriya Gupta, Anxin Ma, Alexander Hartmaier
Winter School International Seminar on Process Chain Simulation and Related Topics, Institute of Technology, Karlsruhe, Germany
- 17.03.2014Mechanical properties of interfaces in TiAl α2/γ lamellar microstructures: atomistic studyMansour Kanani, Rebecca Janisch, Alexander Hartmaier
Winter School International Seminar on Process Chain Simulation and Related Topics, Institute of Technology, Karlsruhe, Germany
- 17.03.2014Application of J2- and crystal plasticity to cyclic loading conditions: accumulation of plastic strainsMartin Boeff, Alexander Hartmaier
Winter School International Seminar on Process Chain Simulation and Related Topics, Institute of Technology, Karlsruhe, Germany
- 25.02.2014Micromechanical modelling of tempered martensiteRehman Hameed, Martin Boeff, Anxin Ma, Victoria Yardley, Alexander Hartmaier
Schöntal symposium on dislocation based plasticity, Schöntal, Germany
- 19.02.2014Modelling and understanding the strength of grain boundaries based on ab initio resultsRebecca Janisch, Xueyong Pang, Arshad Mahmood Tahir, Alexander Hartmaier
TMS Annual Meeting and Exhibition, San Diego, USA
- 17.02.2014Reduction effect on thermal conductivity of silicon by defect structures investigated from atomistic levelTao Wang, Georg Madsen, Alexander Hartmaier
TMS Annual Meeting and Exhibition, San Diego USA
- 05.12.2013Large-scale molecular dynamics simulating of growth, microstructure and properties of plasma-spray coatingsTao Wang, Christoph Begau, Godehard Sutmann, Alexander Hartmaier
Institute of Energy and Climate Research (IEK-1), Forschungszentrum Jülich, Jülich, Germany
- 12.11.2013Coupled diffusion-displacement modelling of crack propagation on double cantilever beam specimensPhilipp Schwittek, Tim Heitbreder, Alexander Hartmaier
ICAMS Advanced Discussions, Bochum, Germany
- 12.11.2013Large-scale molecular dynamics simulation of growth, microstructure and properties of plasma-spray coatingsTao Wang, Christoph Begau, Godehard Sutmann, Alexander Hartmaier
ICAMS Advanced Discussions, Bochum, Germany
- 11.11.2013Superalloys: microstructure evolution modelling and creep deformationMohan Kumar Rajendran, Siwen Gao, Anxin Ma, Alexander Hartmaier, Oleg Shchyglo, Ingo Steinbach
ICAMS Advanced Discussions, Bochum, Germany
- 06.11.2013Interface properties and deformation mechanism of TiAl α2/γ lamellar microstructures from atomistic simulationsMansour Kanani, Rebecca Janisch, Alexander Hartmaier
Materials Day 2013, Ruhr-Universität Bochum, Bochum, Germany
- 12.10.2013Effective hydraulic properties of sphere packings by microscopic SPH analysisRakulan Sivanesapillai, Holger Steeb, Alexander Hartmaier
ALERT Geomaterials Poster Session 2013, Aussois, France
- 01.10.2013Interface properties and grain boundary mechanics in a TiAl γ/α2 lamellar microstructure through atomistic simulationsMansour Kanani, Rebecca Janisch, Alexander Hartmaier
DGM Intermetallics 2013, Bad Staffelstein, Germany
- 18.09.2013Effective hydraulic properties of porous media by pore-scale smoothed particle hydrodynamics analysisRakulan Sivanesapillai, Holger Steeb, Alexander Hartmaier
3rd International Conference on Particle-Based Methods: PARTICLES 2013, Stuttgart, Germany
- 10.09.2013Effect of impurities on inter-granular fracture strength of body centered cubic metalsArshad Mahmood Tahir, Venkata Naga Sudheer Ganisetti, Rebecca Janisch, Alexander Hartmaier
EUROMAT 2013, Sevilla, Spain
- 10.09.2013Mechanical properties and deformation behaviour of TiAl/Ti3Al lamellar microstructures: an atomistic studyMansour Kanani, Rebecca Janisch, Alexander Hartmaier
EUROMAT 2013, Sevilla, Spain
- 10.09.2013Surface roughness effect on static, dynamic and mechanical properties of polymers at interfacesDhiraj Kumar Mahajan, Fathollah Varnik, Alexander Hartmaier
3rd International Conference on Material Modelling (ICMM), Warsaw, Poland
- 09.09.2013Crystal plasticity phase transformation model for metastable austenitic stainless steelSatyapriya Gupta, Anxin Ma, Alexander Hartmaier
EUROMAT 2013, Sevilla, Spain
- 26.07.2013Effect of substrate topography on adhesion properties of polymer coatingsDhiraj Kumar Mahajan, Fathollah Varnik, Alexander Hartmaier
7th International Discussion Meeting on Relaxation in Complex Systems, Barcelona, Spain
- 23.07.2013Study of creep behaviour of cobalt-base superalloy single crystal by 3D discrete dislocation dynamicsSiwen Gao, Anxin Ma, Alexander Hartmaier
International workshop on advanced cobalt-base superalloys, Erlangen, Germany
- 09.07.2013Micromechanical modelling based on 3D microstructuresAlexander Hartmaier, Rehman Hameed, Aenne Köster, Anxin Ma
European Congress on Stereology, Kaiserslautern, Germany
- 26.06.2013Microstructure based fatigue simulations using conventional and crystal plasticityMartin Boeff, Anxin Ma, Alexander Hartmaier
Mikrostrukturmechanik im DGM-FA Computersimulation, Osnabrück, Germany
- 20.06.2013Application of crystal plasticity to cyclic loading and comparison to conventional plasticityMartin Boeff, Anxin Ma, Alexander Hartmaier
13th International Conference of Fracture, Beijing, China
- 18.06.2013Atomistically informed continuum models for fractureAlexander Hartmaier, Arshad Mahmood Tahir, Rebecca Janisch
13th International Conference on Fracture, Beijing, China
- 17.06.2013Analysis of hydrogen assisted fracture in martensitic steelsPhilipp Schwittek, Alexander Hartmaier
13th International Conference on Fracture, Beijing, China
- 05.06.2013Application of disclination dynamic: twin boundary motion in magnetic shape-memory alloysBenjamin Reinholz, Steffen Brinckmann, Alexander Hartmaier, Brittany Muntifering, William Knowlton, Peter Müllner
ICFSMA'13, Boise, USA
- 07.05.2013Scalebridging descriptions of mechanical properties of multiphase materialsAlexander Hartmaier
ICAMS² 2013, International Colloquium on Advanced Materials Simulation, Bochum, Germany
- 06.05.2013Deformation at high temperature (creep in Ni-based superalloys)Siwen Gao, Anxin Ma, Alexander Hartmaier
ICAMS² 2013, Ruhr-Universität Bochum, Bochum, Germany
- 06.05.2013Polymer/substrate interfaces: simulation of structure, properties and behaviourDhiraj Kumar Mahajan, Anatoly Berezkin, Ulrich P. Biedermann, Fathollah Varnik, Alexander Hartmaier
ICAMS² 2013, International Colloquium on Advanced Materials Simulation, Bochum, Germany
- 13.03.2013Computational study of the intergranular fracture strength of transition metals in the presence of impurity atomsArshad Mahmood Tahir, Venkata Naga Sudheer Ganisetti, Rebecca Janisch, Alexander Hartmaier
DPG Spring Meeting 2013, Regensburg, Germany
- 13.03.2013On the coupling of crystal-plasticity and the phase-field methodPhilipp Simon Engels, Oleg Shchyglo, Anxin Ma, Alexander Hartmaier
SiMiDe Spring School, Bochum, Germany
- 13.03.2013Ab-initio prediction of the critical thickness of a coherent precipitateSankari Sampath, Rebecca Janisch, Alexander Hartmaier
DPG Spring Meeting 2013, Regensburg, Germany
- 12.03.2013Reduction of lattice thermal conductivity of silicon by defects investigated by molecular dynamicsTao Wang, Alexander Hartmaier
SiMiDe Spring School, Bochum, Germany
- 11.03.2013Mechanical properties of fully lamellar TiAl alloys obtained from a DFT studyMansour Kanani, Rebecca Janisch, Alexander Hartmaier
DPG Spring Meeting 2013, Regensburg, Germany
- 14.11.2012Effect of substrate topography on mechanical properties of glassy polymer coatingsDhiraj Kumar Mahajan, Fathollah Varnik, Alexander Hartmaier
ADGLASS Workshop 2012, Bremen, Germany
- 08.11.2012Role of grain and phase boundaries on deformation and internal stresses during deformation of TRIP assisted multiphase steelsSatyapriya Gupta, Anxin Ma, Alexander Hartmaier
Materials Day Ruhr-University Bochum, Bochum, Germany
- 08.11.2012The role of coherency strain in the evolution of a metastable precipitate in a molybdenum-carbon binary systemSankari Sampath, Rebecca Janisch, Suzana G. Fries, Alexander Hartmaier
Materials Day 2012, Ruhr-University Bochum, Germany
- 08.11.2012In-situ micro shear experiments on fcc-metals in the scanning electron microscopeJenna-Kathrin Heyer, Janine Pfetzing-Micklich, Steffen Brinckmann, Alexander Hartmaier, Gunther Eggeler
10th Materials Day, Ruhr-Universität bochum, Bochum, Germany
- 19.10.2012Multiscale modelling of the influence of C on the intergranular-fracture strength of bcc Mo, W and FeArshad Mahmood Tahir, Rebecca Janisch, Alexander Hartmaier
MMM 2012 - 6th International Conference on Multiscale Materials Modeling, Biopolis, Singapore
- 18.10.2012Effect of surface roughness on cohesive bonding of polymer-solid interfacesDhiraj Kumar Mahajan, Fathollah Varnik, Alexander Hartmaier
MMM 2012 - 6th International Conference on Multiscale Materials Modeling, Biopolis, Singapore
- 18.10.2012Efficient ab-initio characterisation of the mechanical behavior of grain boundariesRebecca Janisch, Naveed Ahmed, Xueyong Pang, Alexander Hartmaier
MMM 2012 - 6th International Conference on Multiscale Materials Modeling, Biopolis, Singapore
- 17.10.2012The role of coherency strain in the evolution of a metastable precipitate in the molybdenum-carbon binary systemRebecca Janisch, Sankari Sampath, Alexander Hartmaier
MMM 2012, 6th international conference on multiscale materials modeling, Biopolis, Singapore
- 07.10.2012Crystal plasticity modelling on single crystal and polycrystal of a ferritic steel sheetJunhe Lian, Siwen Gao, Mohamed Sharaf, Napat Vajragupta, Benjamin Schmaling, Anxin Ma, Sebastian Münstermann, Alexander Hartmaier, Wolfgang Bleck
Materials Science & Technology 2012 Pittsburgh, USA
- 27.09.2012Continuum simulation of the dislocation density evolution during nanoindentationPhilipp Simon Engels, Anxin Ma, Alexander Hartmaier
MSE 2012, Darmstadt, Germany
- 27.09.2012Micromechanical based constitutive modelling of transformation induced plasticityAenne Köster, Anxin Ma, Alexander Hartmaier
MSE 2012, Darmstadt, Germany
- 27.09.2012Plastic-strain gradient induced internal stress and geometrically necessary dislocation density in grain-boundary regionsAnxin Ma, Alexander Hartmaier
MSE 2012, Darmstadt, Germany
- 27.09.2012Effect of strain gradient in deformation behaviour of multiphase steelsSatyapriya Gupta, Anxin Ma, Alexander Hartmaier
MSE 2012, Darmstadt, Germany
- 26.09.2012Application of crystal plasticity to cyclic loading and comparison to conventional plasticityMartin Boeff, Steffen Brinckmann, Alexander Hartmaier
MSE 2012, Darmstadt, Germany
- 26.09.2012Atomistic study of the influence of lattice defects on thermal conductivityTao Wang, Alexander Hartmaier
MSE 2012, Darmstadt, Germany
- 26.09.2012Nanoscale simulation in fcc and bcc-crystals using cluster-based quasi continuum methodNirav Vinodkumar Prajapati, Bernhard Eidel, Alexander Hartmaier
MSE 2012, Darmstadt, Germany
- 26.09.2012Discrete disclination dynamics: hierarchical twin-boundary motion in magnetic shape-memory alloysBenjamin Reinholz, Steffen Brinckmann, Alexander Hartmaier
MSE 2012, Darmstadt, Germany
- 24.09.2012Generation of statistically-based RVE for dual-phase microstructure using multiplicative weighted Voronoi tessellation and the application to crystal plasticityNapat Vajragupta, Junhe Lian, Mohamed Sharaf, Benjamin Schmaling, Anxin Ma, Sebastian Münstermann, Alexander Hartmaier, Wolfgang Bleck
International workshop on computational mechanics of materials IWCMM XXII
- 10.09.2012Assessment of mechanical properties by inverse analysis of (nano-) indentationsBenjamin Schmaling, Rehman Hameed, Pourya Noury, Philipp Schwittek, Alexander Hartmaier
2012 International Hydrogen Conference, Jackson Lake Lodge, USA
- 27.08.2012Constitutive model developing for bcc-iron based on atomistic analysisAenne Köster, Anxin Ma, Alexander Hartmaier
Dislocations 2012, Budapest, Hungary
- 24.08.2012Role of coherency strain in the stabilization of a metastable precipitate of the Mo-C binary systemSankari Sampath, Rebecca Janisch, Suzana G. Fries, Alexander Hartmaier
ICSMA 16, Bangalore, India
- 26.09.2012Analysis of diffusion paths and effective diffusion coefficients in multiphase materialsPhilipp Schwittek, Steffen Brinckmann, Alexander Hartmaier
MSE 2012, Darmstadt, Germany
- 23.07.2012Study of cluster based energy sampling quasi continuum method and its application to nano-indentationNirav Vinodkumar Prajapati, Bernhard Eidel, Alexander Hartmaier
Junior Euromat 2012, Lausanne, Switzerland
- 23.07.2012In-situ micro shear experiments on fcc metals in the scanning-electron microscopeJenna-Kathrin Heyer, Janine Pfetzing-Micklich, Steffen Brinckmann, Alexander Hartmaier, Gunther Eggeler
Junior-Euromat 2012, Lausanne, Switzerland
- 12.07.2012Plastic-strain gradient induced internal stress and geometrically necessary dislocation density in grain boundary regionsAnxin Ma, Alexander Hartmaier
8th European Solid Mechanics Conference ESMC 2012 Graz, Austria
- 06.06.2012A novel method to obtain yield strength and work hardening rate from nanoindentationBenjamin Schmaling, Rehman Hameed, Aenne Köster, Anxin Ma, Alexander Hartmaier
1st World Congress on Advanced Materials, Beijing, China
- 15.05.2012Micro-shear experiments on fcc metalsJenna-Kathrin Heyer, Janine Pfetzing-Micklich, Steffen Brinckmann, Alexander Hartmaier, Gunther Eggeler
Agilent 2012 Nanoindentation Users' Meeting, Fürth, Germany
- 29.03.2012Role of coherency strain in the stabilization of a metastable precipitate of the Mo-C binary systemSankari Sampath, Rebecca Janisch, Suzana G. Fries, Alexander Hartmaier
DPG spring meeting, Berlin, Germany
- 26.03.2012C at Σ5 symmetrical tilt grain boundary in Mo - from ab-initio results to traction-separation lawArshad Mahmood Tahir, Rebecca Janisch, Alexander Hartmaier
DPG Spring Meeting 2012, Berlin, Germany
- 26.03.2012Ab-initio study of the mechanical shear behavior of Al with and without normal stressXueyong Pang, Rebecca Janisch, Alexander Hartmaier
DPG Spring Meeting 2012, Berlin, Germany
- 09.03.2012Plastische Verformung durch Phasentransformation: konstitutive Beschreibung von TRIP StählenAenne Köster, Anxin Ma, Alexander Hartmaier
DGM AG Mikrostruktur, Siegen, Germany
- 06.03.2012Mechanisms of crazing in glassy polymers revealed by molecular dynamics simulationsDhiraj Kumar Mahajan, Alexander Hartmaier
IAS Winter School – Hierarchical Methods for Dynamics in Complex Molecular Systems, Juelich, Germany
- 15.02.2012Microstructural influence on growth of short cyclic cracks in structural steelsMohamed Sharaf, Sebastian Münstermann, Steffen Brinckmann, Alexander Hartmaier
44. Tagung des DVM-Arbeitskreises Bruchvorgänge, Darmstadt, Germany
- 26.01.2012Influence of C on the mechanical properties of a Σ5 STGB in Mo: ab-initio studyArshad Mahmood Tahir, Rebecca Janisch, Alexander Hartmaier
1st Austrian-German workshop on Computational Materials Design, Kramsach, Austria
- 26.01.2012The role of coherency strain on the structural stability of a metastable precipitate in Mo-C binary systemSankari Sampath, Rebecca Janisch, Suzana G. Fries, Alexander Hartmaier
1st Austrain German workshop on computational materials design, Kramsach, Austria
- 05.01.2012Micro-shear deformation of fcc crystalsJenna-Kathrin Heyer, Janine Pfetzing-Micklich, Steffen Brinckmann, Alexander Hartmaier, Gunther Eggeler
International Symposium on Plasticity, San Juan, USA
- 18.11.2011Mechanische Eigenschaften mehrphasiger WerkstoffeAlexander Hartmaier
DGM-Fortbildung "Modellierung und Simulation", ICAMS, Ruhr-Universität Bochum, Bochum, Germany
- 10.10.2011Direct evaluation of dislocation networks and dislocation density tensors from atomistic dataChristoph Begau, Jun Hua, Alexander Hartmaier
ECI Conference on Nanomechanical Testing 2011, Lanzarote, Spain
- 09.10.2011Micro-shear deformation of fcc crystalsJanine Pfetzing-Micklich, Steffen Brinckmann, Jan Frenzel, Alexander Hartmaier, Gunther Eggeler
ECI Conference on Nanomechanical Testing 2011, Lanzarote, Spain
- 30.09.2011Combined molecular dynamics and dislocation dynamics simulation: a study of dislocation nucleation at crack tipsSteffen Brinckmann, Dhiraj Kumar Mahajan, Christoph Begau, Alexander Hartmaier
DGM AG Mikrostruktur, Braunschweig
- 12.09.2011Ab-initio investigation of the influence of carbon on the mechanical properties of the sigma-5 symmetrical tilt grain boundary in molybdenumArshad Mahmood Tahir, Rebecca Janisch, Alexander Hartmaier
EUROMAT 2011 - European Congress on Advanced Materials and Processes, Montpellier, France
- 12.09.2011Localization during failure of glassy polymersDhiraj Kumar Mahajan, Steffen Brinckmann, Alexander Hartmaier
EUROMAT 2011 - European Congress on Advanced Materials and Processes, Montpellier, France
- 12.09.2011The role of interface energy in the evolution of a metastable phase in the molybdenum-carbon binary systemSankari Sampath, Rebecca Janisch, Suzana G. Fries, Alexander Hartmaier
EUROMAT 2011 - European Congress on Advanced Materials and Processes, Montpellier, France
- 12.09.2011Ab-initio study of the shear properties of aluminium with different methodsXueyong Pang, Rebecca Janisch, Naveed Ahmed, Alexander Hartmaier
EUROMAT 2011 - European Congress on Advanced Materials and Processes, Montpellier, France
- 12.09.2011Combined molecular dynamics and dislocation dynamics simulation: a study of dislocation nucleation at crack tipsSteffen Brinckmann, Dhiraj Kumar Mahajan, Christoph Begau, Alexander Hartmaier
EUROMAT-2011, Montpellier, France
- 10.07.2011Ab-initio study of the γ-surfaces of aluminium bulk and grain boundariesXueyong Pang, Naveed Ahmed, Rebecca Janisch, Alexander Hartmaier
ψ-k/CECAM/ccp9 graduate school, Oxford, UK
- 26.06.2011Direct calculation of dislocation density tensors from atomistic dataJun Hua, Christoph Begau, Alexander Hartmaier
ICMAT 2011, Singapore
- 02.05.2011Alloying with light elementsArthur Bialon, Elisaveta Hristova, Sankari Sampath, Arshad Mahmood Tahir, Thomas Hammerschmidt, Rebecca Janisch, Ralf Drautz, Alexander Hartmaier
Materials Design in Chemical Compound Space Workshop, IPAM, Institute for Pure and Applied Mathematics, UCLA, Los Angeles, USA
- 01.12.2010Multiscale modeling of deformation of ultra-fine grained metals at high homologous temperaturesAlexander Hartmaier, Naveed Ahmed
Materials Research Society (MRS) Fall Meeting 2010, Boston, USA
- 04.11.2010Transformation induced plasticity modelling based on micromechanical approachesBenjamin Schmaling, Anxin Ma, Alexander Hartmaier
ICAMS Advanced Discussion on Current Developments, Bochum, Germany
- 31.10.2010Large-scale atomistic simulation of nanoindentation: direct calculation of dislocation density tensors from atomistic dataAlexander Hartmaier, Jun Hua, Christoph Begau
18th European Conference on Fracture (ECF18), Dresden, Germany
- 24.10.2010The solubility of carbon in bcc iron under volumetric strain: comparison of DFT and empirical methodsElisaveta Hristova, Rebecca Janisch, Ralf Drautz, Alexander Hartmaier
468. Wilhelm und Else Heraeus-Seminar "Ab initio Description of Iron and Steel: Mechanical properties", Ringberg Castle, Tegernsee, Germany
- 24.10.2010Influence of light elements on the mechanical properties of interfaces in transition metalsRebecca Janisch, Sankari Sampath, Andreas Böhner, Christian Elsässer, Alexander Hartmaier
468. Wilhelm und Else Heraeus-Seminar "Ab initio Description of Iron and Steel: Mechanical properties", Ringberg Castle, Tegernsee, Germany
- 07.10.2010The solubility of carbon in bcc iron under volumetric strain: comparison of DFT and empirical methodsElisaveta Hristova, Rebecca Janisch, Ralf Drautz, Alexander Hartmaier
Fifth International Conference on Multiscale Materials Modeling (MMM2010), Freiburg, Germany
- 07.10.2010Multiscale modeling of polycrystal deformation with grain boundary slidingAhmed Shaban, Anxin Ma, Alexander Hartmaier
Fifth International Conference on Multiscale Materials Modeling (MMM2010), Freiburg, Germany
- 07.10.2010Transformation induced plasticity modelling based on micromechanical approachesBenjamin Schmaling, Anxin Ma, Alexander Hartmaier
Fifth International Conference on Multiscale Materials Modeling (MMM2010), Freiburg, Germany
- 05.10.2010Modeling the transition from toughening to embrittlement by grain boundaries in tungstenXiaohui Zeng, Daniel Rupp, Sabine Weygand, Alexander Hartmaier
Fifth International Conference on Multiscale Materials Modeling (MMM2010), Freiburg, Germany
- 04.10.2010The introduction of a concurrent multiscale model for fcc metalsSteffen Brinckmann, Dhiraj Kumar Mahajan, Christoph Begau, Alexander Hartmaier
Fifth International Conference on Multiscale Materials Modeling (MMM2010), Freiburg, Germany
- 26.09.2010Mesoscale and atomistic modeling and simulation of grain growth on the nanoscaleReza Darvishi Kamachali, Jun Hua, Ingo Steinbach, Alexander Hartmaier
Optimising Performance Through Integrated Modelling of Microstructure (OPTIMoM), Queens College Cambridge, UK
- 08.09.2010A micromechanical damage simulation of dual phase steels using XFEM and cohesive elementsNapat Vajragupta, V. Uthaisangsuk, Benjamin Schmaling, Sebastian Münstermann, Alexander Hartmaier, Wolfgang Bleck
The 20th International Workshop on Computational Mechanics of Materials 2010, Loughborough, United Kingdom, September 8-10, 2010
- 02.09.2010The introduction of a concurrent multiscale model for fcc metalsSteffen Brinckmann, Dhiraj Kumar Mahajan, Christoph Begau, Alexander Hartmaier
18th European Conference of Fracture (ECF), Dresden, Germany
- 02.09.2010Transition from toughening to embrittlement by grain boundaries in tungstenXiaohui Zeng, Daniel Rupp, Sabine Weygand, Alexander Hartmaier
18th European Conference of Fracture (ECF), Dresden, Germany
- 30.08.2010Polycrystalline material deformation modeling with grain boundary sliding and damage accumulationAhmed Shaban, Anxin Ma, Alexander Hartmaier
18th European Conference of Fracture (ECF), Dresden, Germany
- 26.08.2010Fracture and brittle-to-ductile transition in tungsten single and polycrystalsAlexander Hartmaier, Xiaohui Zeng, Daniel Rupp
Materials Science and Engineering Conference (MSE) 2010, Darmstadt, Germany
- 24.08.2010Grain growth mechanism in nanocrystalline materials: multi-phase field and molecular dynamics studiesReza Darvishi Kamachali, Jun Hua, Ingo Steinbach, Alexander Hartmaier
Materials Science and Engineering Conference (MSE) 2010, Darmstadt, Germany
- 28.07.2010Analyzing dislocation nucleation and multiplication in atomistic nanoindentation simulationsChristoph Begau, Alexander Hartmaier
Newcastle Nanoindentation Conference 2, Newcastle, UK
- 25.06.2010Bestimmung des Versetzungsdichtetensor in atomistischen SimulationenChristoph Begau, Alexander Hartmaier
Fachausschuss Computersimulation, RWTH Aachen, Aachen, Germany
- 25.05.2010Superalloy single crystal creep modelling in a wide temperature rangeAnxin Ma, Alexander Hartmaier
Euro Superalloy 2010, Wildbad Kreuth, Germany
- 22.03.2010Ab-initio characterisation of the mechanical behavior of grain boundariesRebecca Janisch, Naveed Ahmed, Alexander Hartmaier
DPG Spring Meeting 2010, Regensburg, Germany
- 30.11.2009On-the-fly analysis of large-scale molecular dynamics simulations: calculating lattice rotation and dislocation density tensors from atomistic dataAlexander Hartmaier, Jun Hua, Christoph Begau
Fall Meeting of the Materials Research Society (MRS), Boston, USA
- 12.11.2009Deformation mechanisms and fracture characteristics of γ-TiAl alloysDennis Peter, Jan Frenzel, Gunther Eggeler, Alexander Hartmaier
7. Materialwissenschaftlicher Tag 2009, Bochum, Germany
- 11.10.2009Determination of dislocation density from atomistic dataJun Hua, Alexander Hartmaier
ECI Conference on Nanomechanical Testing 2009, Barga, Italy
- 23.09.2009Cohesive element model for simulation of crack growth in composite materialsMarina Prechtel, Rebecca Janisch, Günter Leugering, Alexander Hartmaier, Paul Steinmann
International Conference on Crack Paths, Vincenza, Italy
- 07.09.2009Cohesive laws for grain boundaries from ab initio calculationsRebecca Janisch, Naveed Ahmed, Alexander Hartmaier
Euromat 2009, Glasgow, UK
- 10.09.2009Ab-initio investigation of the mechanical properties of grain boundaries in aluminumNaveed Ahmed, Rebecca Janisch, Alexander Hartmaier
Euromat 2009, Glasgow, UK
- 16.08.2009Dislocation dynamics study of plasticity and strain-rate sensitivity in ultra-fine grained metals Naveed Ahmed, Alexander Hartmaier
International Conference on the Strength of Materials, Dresden, Germany
- 18.08.2009Deformation pattern of a Ni-base single-crystalline superalloy in Vickers indentation: crystal plasticity simulation versus experiment Bernhard Eidel, Alexander Hartmaier
International Conference on the Strength of Materials, Dresden, Germany
- 18.08.2009Modeling toughening and embrittling due to grain boundaries by dislocation dynamics Xiaohui Zeng, Alexander Hartmaier
International Conference on the Strength of Materials, Dresden, Germany
- 17.08.2009Determination of Burgers vectors from atomistic data Jun Hua, Alexander Hartmaier
International Conference on the Strength of Materials, Dresden, Germany
- 12.07.2009Modeling the influence of grain boundaries on fracture toughness by using a combined dislocation - cohesive zone model Xiaohui Zeng, Alexander Hartmaier
International Conference on Fracture, Ottawa, Canada
- 23.03.2009Elastic and plastic properties of special grain boundaries in aluminium Rebecca Janisch, Naveed Ahmed, Alexander Hartmaier
DPG Spring Meeting 2009, Dresden, Germany
- 27.10.2008Onset of plasticity under nanoindentation: influence of the interatomic potentialGerolf Ziegenhain, Alexander Hartmaier, Herbert M. Urbassek
International Conference on Multiscale Materials Modelling, Tallahassee, Florida, USA
Professional Experience
Since 2008
Professor for Mechanics of Materials at Ruhr-Universität Bochum and director at ICAMS, Germany
2005-2008
Professor for Materials Science at Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany
2002-2005
Group leader at Max-Planck-Institut für Metallforschung, Stuttgart, Germany
1999-2002
Research engineering at Hilti Corp., Liechtenstein
1996-1999
Research assistant at Max-Planck-Institut für Metallforschung, Stuttgart, Germany
Education
Doctorate (Dr. rer. nat.) at Universität Stuttgart, Germany
Diploma course in physics (M.Sc. equivalent) at Universität Kaiserslautern, Germany
