About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Multiscale Modeling of Solidification Microstructures of Refractory Metals and Alloys
|
| Author(s) |
Joni Kaipainen, Kate Elder, Scott Peters, Thomas Voisin, Sila Atabay, Aurelien Perron, Joseph McKeown, Nikolas Provatas, Anssi Laukkanen, Tatu Pinomaa |
| On-Site Speaker (Planned) |
Joni Kaipainen |
| Abstract Scope |
Refractory metals and alloys have remarkably good high temperature properties, resulting in many potential use cases, for example as plasma facing materials in fusion reactors. Using a multiscale simulation approach, we predict solidification microstructures of these materials under various additive manufacturing processing conditions.
The multiscale simulation framework begins with molecular dynamics simulations, which are used for obtaining necessary parameters of the solid-liquid interface. Computational fluid dynamics simulations are used for the modeling of melt pool dynamics, from which a distribution of representative thermal gradients and solidification velocities are obtained. All these properties are used together with large-scale multi-component solidification phase field simulations to predict solidification microstructures under different processing conditions and sections of the melt pool. The simulation results are compared and validated with experimental single scan tracks. Finally, the microcrack formation due to residual stresses and their mitigation based on altering processing conditions and alloy composition is discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Modeling and Simulation, Solidification |