| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Atomistic and Phase Field Simulations of Rapid Solidification Towards Refractory High Entropy Alloys |
| Author(s) |
Joni Kaipainen, Tatu Pinomaa, Kate Elder, Scott Peters, Joseph McKeown, Anssi Laukkanen |
| On-Site Speaker (Planned) |
Joni Kaipainen |
| Abstract Scope |
Refractory metals and refractory high-entropy alloys are promising candidates for plasma-facing materials (PFMs) due to their high melting points and favorable mechanical and thermal properties. Tailoring manufacturing processes such as AM towards the requirements of PFMs could lead to substantial improvements in their performance.
We conduct a multiscale analysis involving atomistic simulations, phase field modeling and AM melt pool CFD simulations. Solidification-related anisotropic material parameters are extracted from atomistic simulations and are used as inputs in a solidification phase field model coupled with thermodynamic CALPHAD data. Input temperature is obtained from a CFD-based AM melt pool model.
Simulation results are compared with experimental single scan tracks of tungsten-based refractory alloys to validate model accuracy. Simulated primary dendrite arm spacings and cell spacings are compared with experiments, and a process map of solidification structures is generated for various process conditions. Finally, printability challenges and micromechanical behavior of AM microstructures are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Additive Manufacturing, Solidification |