About this Abstract |
| Meeting |
TMS Specialty Congress 2026
|
| Symposium
|
4th World Congress on High Entropy Alloys (HEA 2026)
|
| Presentation Title |
Solidification Modeling and Validation for Novel Refractory Multi-Principal Element Alloys Produced in Additive Manufacturing Conditions |
| Author(s) |
Megan D. Le Corre, Amy Clarke |
| On-Site Speaker (Planned) |
Megan D. Le Corre |
| Abstract Scope |
Recent work evaluating the as-solidified microstructures of refractory multi-principal element alloys (RMPEAs) produced by additive manufacturing (AM) indicates unique solidification conditions as compared to more traditional, dilute alloys. Design of RMPEAs optimized for AM production necessitates understanding the solidification mechanisms responsible for increased grain refinement and balancing them against mechanisms that may lead to defect formation. Here, thermophysical and solidification properties are determined by CALPHAD simulations and classical solidification models are applied to predict resultant microstructures and defects in single laser track melts of four novel RMPEAs under simulated AM conditions. These models are shown to be a powerful predictive tool to evaluate resulting microstructures. Predictions of compositional undercooling and solidification cracking are correlated to experimental observations of new grain nucleation and defect formation in laser track melts. These initial studies indicate that pronounced differences in preferred microstructure are achievable under identical conditions by variations to alloy compositions. |
| Proceedings Inclusion? |
Undecided |