| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloy Behavior and Design Across Length-Scales: An SMD Symposium Honoring Easo George
|
| Presentation Title |
Theory-guided Design of High-strength, Ductile, Single-phase BCC High Entropy Alloys |
| Author(s) |
William A. Curtin, You Rao, Carolina Baruffi, Anthony De Luca, Christian Leinenbach |
| On-Site Speaker (Planned) |
William A. Curtin |
| Abstract Scope |
The immense compositional space of High Entropy Alloys presents possibilities of discovering compositions satisfying multiple application requirements. We introduce a theory-based parameter-free alloy selection procedure to satisfy specified mechanical and thermodynamic properties. We first make selections of equiatomic quinary BCC refractory HEAs in the family Cr-Mo-W-V-Nb-Ta-Ti-Zr-Hf to find alloys that are single-phase, high melting point, and strong and ductile at room temperature. We identify HfMoNbTaTi as the most-promising alloy. We then search within Hf-Mo-Nb-Ta-Ti with more-stringent design/performance criteria and find 10 quinaries with lower densities, higher specific strength, more-likely-ductile, and melting points above 2050C. We validate the selection procedure by fabricating and characterizing Hf15Mo25Nb20Ta5Ti35, confirming many predictions. Extensions to the quaternary Hf-Mo-Nb-Ti family identifies 15 new promising alloys for future study. Overall, our design procedure provides a theory-based way to quickly identify target alloys with a desired suite of properties, facilitating the discovery of next-generation materials. |
| Proceedings Inclusion? |
Planned: |