| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Late News Poster Session
|
| Presentation Title |
A-23: Computational Discovery of Ultra-high Strength BCC Refractory Metal-based MPEAs |
| Author(s) |
Kate L. M. Elder, Joel M. Berry, Aurelien P. P. Perron, Hunter B. Henderson, Jibril Shittu, Zachary Sims, Scott K. McCall, Joseph T. McKeown |
| On-Site Speaker (Planned) |
Kate L. M. Elder |
| Abstract Scope |
Body centered cubic (BCC) refractory metal-based multi-principal element alloys (MPEAs) are known for maintaining a high yield stress at elevated temperatures, an excellent mechanical property, necessary for operation in extreme environments. To exploit the enhanced mechanical properties, tailored MPEAs with both high strength and robust BCC phase stability are needed. However, these properties vary drastically with temperature, number of elements, and composition of elements. Through analytical calculations, we investigate all MPEAs from the Al-Cr-Fe-Hf-Mo-Nb-Ta-Ti-V-W-Zr family with up to eleven elements to identify candidate alloys that maintain a high yield stress or specific yield stress. These results are filtered with phase stability predictions from CALPHAD to ensure that the BCC phase is stable at high temperatures. Select compositions predicted to maintain high strength or specific strength and a stable BCC phase are manufactured and mechanically tested to validate the tailored MPEA design process. Prepared by LLNL under Contract DE-AC52-07NA27344. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Entropy Alloys, Mechanical Properties, |