|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
||On the influence of the representative volume elements size on predicting dislocation microstructure evolution in laser additive manufacturing metals
||Markus Sudmanns, Jaafar A. El-Awady
|On-Site Speaker (Planned)
Selective Laser Melting (SLM) is a promising technique for additive manufacturing (AM) of metallic components, however, modeling dislocation microstructure evolution during processing and mechanical loading involves significant challenges due to imposed constraints in domain size, time scale, and boundary conditions. The complex interactions induced by the multi-scale nature of the process with high temperatures, induced residual stresses, and microsegregation requires careful consideration of the influence of the simulation domain on the predicted results. We combine Finite Element Analysis of thermo-mechanical stresses induced by single track SLM scans of various alloys and the associated dislocation microstructure evolution with large-scale 3D discrete dislocation dynamics simulations to investigate the relationship between time scale and simulation domain in mesoscale simulations and properties of evolving microstructural features. The results here provide an understanding of requirements for simulation domains in mesoscale simulations for being sufficiently representative of the overall process under consideration.
||Additive Manufacturing, Computational Materials Science & Engineering,