| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Implementation of Solidification Modeling Towards Tailorable Refractory Microstructures in Additive Manufacturing |
| Author(s) |
Megan D. Le Corre, Kaitlyn Mullin, Ruben Ochoa, Adriana Eres Castellanos, Tresa Pollock, Amy Clarke |
| On-Site Speaker (Planned) |
Megan D. Le Corre |
| Abstract Scope |
Additive manufacturing (AM) of traditional refractory alloys and refractory multi-principal element alloys (RMPEAs) promises to circumvent potential fabrication challenges associated with traditional manufacturing processes. While recent studies of refractory alloys produced by AM have revealed promising results, more work remains to evaluate the foundational solidification behavior associated with and responsible for the resulting microstructures and properties. Thermo-Calc (i.e., CALPHAD) modeling was first implemented to determine relevant thermodynamic parameters. Thermal gradients and solidification velocities produced by laser single track melts of refractory alloys were determined using the Rosenthal heat transfer model and Flow3D™ computational fluid dynamics software. Microstructural morphologies are then correlated to those predicted by the Ivantsov Marginal Stability model and Hunt modification to the Gaümann columnar to equiaxed transition model. Agreement or discrepancy between microstructural predictions and experimentally observed microstructures can be used to calibrate solidification models, ultimately enabling tailorable microstructures and properties in these refractory alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Additive Manufacturing, Modeling and Simulation |