| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Solid-State Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Prediction of Microstructure and Phase Evolution during Multi-track, Multi-layer Directed Energy Deposition of H13 |
| Author(s) |
Neil Bailey, Christopher Katinas, Yung C. Shin |
| On-Site Speaker (Planned) |
Yung C. Shin |
| Abstract Scope |
During additive manufacturing processes, the resultant microstructure can exhibit significant variations. We present combined numerical models developed for predicting microstructure and mechanical properties during laser-based additive processes. A validated, physics-based computational fluid dynamics model with an improved level-set method is built to simulate the heat/mass transport and the dynamic evolution of the molten pool surface on the macro-scale. Based on the three dimensional temperature and cooling rates calculated during the solidification processes, the resultant microstructural evolution is predicted using a computationally efficient novel cellular automata-phase field model during multi-track and multi-layer laser-based deposition processes of multi-component alloys such as H13 alloys. In addition, the solid state phase transformation due to repeated heating and cooling of solidified regions during multi-track and multi-layer deposition is also modeled. The predicted microstructures and phase distributions are used to predict resultant microstructure, hardness and residual stresses, which are validated by the experiments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, ICME, Computational Materials Science & Engineering |