ICAMS / Interdisciplinary Centre for Advanced Materials Simulation
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Micromechanical modeling of additively manufactured 316L stainless steel

Date: 25.06.2018
Time: 16:00
Place: 10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany

Abhishek Biswas
Mahesh Ramaswamy Guru Prasad
Napat Vajragupta
Hamad Hassan
Florian Brenne
Alexander Hartmaier

Additive manufacturing (AM) has recently come into focus for manufacturing of complex metallic structures. Selective laser melting (SLM) is an AM technique employing metal powders as basis. The resultant material can show highly textured, columnar polycrystalline microstructure. This work aims at developing a strategy for micromechanical modeling of such materials to predict the mechanical properties. The columnar microstructure is modeled by packing ellipsoids representative of elongated grains and merging the corresponding tessellation cells. The extracted orientation distribution from EBSD characterization is systematically reduced to closely represent the real texture. To closely represent the real microstructure both orientation and misorientation distribution have been included into the synthetic microstructure. Finally, numerical simulations of uniaxial tensile testing are performed for different loading directions and the results are compared with experimental data

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