Projects
DEM C1 01 Influence of microstructure on mechanical properties of tempered martensite
Ferritic steels with a tempered lath martensite microstructure are used in many applications of technological and economic importance, for example power generation, chemical plant and aerospace. The microstructure... Continue reading "Influence of microstructure on mechanical properties of tempered martensite"DEM C2 01 Fracture initiation and propagation along phase and grain-boundaries
Based on microstructural properties like grain size, orientation, inclusion distributions or other features a scheme is established to evaluate the cycle time to crack initiation of the material. .Continue reading "Fracture initiation and propagation along phase and grain-boundaries"DFG SFB/TR103 C4 Micromechanical modelling of fundamental creep mechanisms in superalloy single crystals.
The typical microstructure of single crystalline superalloys contains relatively soft narrow γ-matrix channels and hard cubic γ′-precipitates. This microstructure confines and controls dislocation... Continue reading "Micromechanical modelling of fundamental creep mechanisms in superalloy single crystals."DFG SFB/TR103 C5 Phase-field simulation of microstructure evolution during solidification, heat treatment and under service conditions
The project examines the evolution of microstructure in single crystal Ni-base superalloys upon solidification, heat treatment and high temperature applications by means of phase-field simulations. The... Continue reading "Phase-field simulation of microstructure evolution during solidification, heat treatment and under service conditions"HPC 19 02 Adaptive load balancing in short range particle simulations
In short range particle simulations, efficient parallel execution on multiple CPUs is typically achieved by the use of spatial decomposition of the total simulation volume. A straightforward subdivision... Continue reading "Adaptive load balancing in short range particle simulations"HPC 19 03 Large scale simulation of multiphase field problems
Multiphase field simulations often require long computation times as well as large amounts of memory to store a multitude of phase fields with different properties. The application of distributed memory... Continue reading "Large scale simulation of multiphase field problems"IEHK 05 01 Microstructure based evaluation of real structures in cold formable steels
Multi-phase steel has unique mechanical properties because of its interplay between high strength and good uniform elongation properties. This is due to the fact that the microstructure is made up of constituents... Continue reading "Microstructure based evaluation of real structures in cold formable steels"IEHK 05 03 Microstructure based evaluation of real structures in cold formable steels II
This project shall continue the work performed in IEHK-05-01 and consists of four tasks; micromechanical damage modelling of multiphase steels, study effects of microstructure morphology on failure behaviour... Continue reading "Microstructure based evaluation of real structures in cold formable steels II"IEHK 05 05 Microstructure based modelling of aging kinetics and mechanical properties of dual phase steels
Aims:Quantification of microscopic structural measures in DP steels Identification of BH properties as function of processing parameters Development of a multi zone model to predict the BH effect Modelling... Continue reading "Microstructure based modelling of aging kinetics and mechanical properties of dual phase steels"IEHK 06 03 Microstructural influences on growth of short cracks in steel under cyclic loading III
The project shall finalize the work performed on the same topic. One of the main purposes of this project is to develop a microstructural model for the simulation of fatigue micro crack growth. In the... Continue reading "Microstructural influences on growth of short cracks in steel under cyclic loading III"LWW 05 01 Experimental and theoretical investigation of micro-shear processes in fcc metals
The task of this project is to combine theoretical and experimental methods for the investigation of micro-plasticity during shear deformation in fcc metals..Continue reading "Experimental and theoretical investigation of micro-shear processes in fcc metals"LWW 07 01 Orientation relationships and variant selection in plate and lath martensite
Martensitic phase transformations exhibit close relationships between morphology and crystallography. Electron backscatter diffraction (EBSD), which allows the acquisition of spatially coupled crystallographic... Continue reading "Orientation relationships and variant selection in plate and lath martensite"MMM 05 02 MD study of plastic deformation by dislocations and phase transformations
Shape memory alloys (SMA) like Ni-Ti show a characteristic phase transformation between a martensite and an austenite phase depending on temperature and mechanical stress. The change in shape during transformation... Continue reading "MD study of plastic deformation by dislocations and phase transformations"MMM 05 03 Plastic deformation by phase transformation: constitutive descriptions of TRIP steels
TRIP (TRansformation Induced Plasticity) steels count among the group of high-strength steels. They exhibit high strength and ductility at the same time. These characteristics can be traced back to the... Continue reading "Plastic deformation by phase transformation: constitutive descriptions of TRIP steels"MMM 05 04 Dislocation density-based crystal plasticity model for phase-field simulation
During the thermal and mechanical treatment of materials, martensitic phase transformations will cause internal stresses in metallic microstructures due to the volumetric and shape change of the crystal... Continue reading "Dislocation density-based crystal plasticity model for phase-field simulation"MMM 15 03 Influence of inclusions on the evolution of the cyclic stress-strain curve
STKS 03 01 Plastic effects on the kinetics of phase transformations
STKS 03 02 Gibbs free energy with elasticity
STKS 05 01 Phase field modelling of large deformations
During simulation of phase transformations large lattice parameter changes (i.e. eigenstrains) might occur. The standard linear elasticity which is typically used in phase field simulations proved to be... Continue reading "Phase field modelling of large deformations"STKS 16 01 Deformation of the strand shell during peritectic transfomation
As The high susceptibility of peritectic steel grades to hot tearing is a well known problem in metallurgy. It easily happens along the dendrites and grain boundaries on mush zone. If hot tears form between... Continue reading "Deformation of the strand shell during peritectic transfomation"STKS 16 03 Spacing selection in columnar peritectic solidification
Solidification of peritectic steel grades in continuous casting is subject to inherent problems due to the peritectic transformation of ferrite to austenite close to the tip of the solidification zone,... Continue reading "Spacing selection in columnar peritectic solidification"STKS 18 01 Spatially resolved modelling of (de-)intercalation in Li-Ion battery materials (SP4)
Charging and discharging processes in lithium ion batteries are connected with intercalation and deintercalation of lithium into/ from the electrode material. While (de-)intercalation is in progress, voltage... Continue reading "Spatially resolved modelling of (de-)intercalation in Li-Ion battery materials (SP4)"
