About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
|
| Presentation Title |
Temperature-dependent Evolution of Dislocation Microstructure and Mechanical Properties of SLM-316L Stainless Steel |
| Author(s) |
Markus Sudmanns, Andrew Birnbaum, Yejun Gu, Athanasios Iliopoulos, John Michopoulos, Jaafar A. El-Awady |
| On-Site Speaker (Planned) |
Jaafar A. El-Awady |
| Abstract Scope |
Selective Laser Melting (SLM) has evolved into a promising technique of additive manufacturing (AM) for building three-dimensional (3D) components with high resolution. However, the relationship between processing conditions and the observed microstructures and mechanical properties is still poorly understood. This prevents a reliable prediction of mechanical properties of SLM manufactured parts. We investigate the multi-scale nature of SLM processing by Finite Element Analysis (FEA) of induced thermo-mechanical stresses and dislocation microstructure evolution by large-scale 3D d6iscrete dislocation dynamics (DDD) simulations of SLM-316L stainless steel in comparison with experiments. The complex interplay and transient nature of temperature, residual stresses, and chemical segregation on the evolution of the dislocation microstructure during the cool-down phase is studied. Further, we investigate the influence of the dislocation microstructure and chemical environment on the mechanical response of the manufactured part. Thereby we provide a unique mechanistic perspective on the complex, multi-scale nature of SLM processing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, ICME, Modeling and Simulation |