About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Modeling, Simulation and Artificial Intelligence
|
| Presentation Title |
Adding Sub-Grain Features to Mesoscale Additive Manufacturing Microstructure Simulations |
| Author(s) |
Theron M. Rodgers, Daniel Moser, Aashique Rezwan, Nicole Aragon, Brooke Hejnal, Stephen Lin, Michael Stender |
| On-Site Speaker (Planned) |
Theron M. Rodgers |
| Abstract Scope |
Simulations of grain formation during metal additive manufacturing (AM) are evolving into essential tools for understanding the sensitive process-structure relationships inherent in this manufacturing method. Current state-of-the-art techniques, such as cellular automata and Monte Carlo simulations, typically predict polycrystalline grain structures. In these models, each grain is represented as a perfect crystal with a uniform crystallographic orientation throughout its volume. However, as-printed microstructures produced by AM often exhibit significant sub-grain heterogeneities, including subgrain orientation gradients, chemical segregation, porosity defects, and the presence of secondary phases. This presentation will detail our efforts to integrate subgrain heterogeneity into simulations for Inconel 625. We will focus on a novel methodology that incorporates solidification-induced misorientation formation and explores the relationship between the resulting misorientations, kernel averaged misorientation, and geometrically necessary dislocation densities.
SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525 |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, Solidification |