| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Simulations/Experiments Integration for Next Generation Hypersonic Materials
|
| Presentation Title |
Rapid Computational Design and Experimental Validation of Ductile High Entropy Alloys for Extreme Environments |
| Author(s) |
Kate L.M. Elder, Brandon Bocklund, Adam Krajewski, Joel Berry, Benjamin Ellyson, Connor Rietema, Jibril Shittu, Zachary Sims, Hunter Henderson, Alexander Baker, Thomas Voisin, Scott McCall, Aurelien Perron, Joseph McKeown |
| On-Site Speaker (Planned) |
Kate L.M. Elder |
| Abstract Scope |
The subset of high entropy alloys (HEAs) consisting of refractory metals (RHEAs) with a body centered cubic (BCC) structure are known to maintain a high yield strength at elevated temperatures, an important property for operation under extreme conditions. However, just tailoring RHEAs to be strong and BCC stable is insufficient and ductility, which is challenging to model, must be incorporated into any alloy design process. Ductility models are compared with experimental elongation data to determine which model accurately predicts ductility in RHEAs. Through analytical calculations, we investigate ternary and quaternary families from the Al-Cr-Fe-Hf-Mo-Nb-Ta-Ti-V-W-Zr element palette to identify ductile candidates. The design strategy is then expanded to rapidly explore the space of higher order non-equiatomic RHEAs by leveraging high-performance computing. Selected compositions predicted to maintain high strength, BCC phase stability and acceptable ductility are manufactured and tested to validate this tailored RHEA design process. Prepared by LLNL under Contract DE-AC52-07NA27344. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, High-Temperature Materials, Mechanical Properties |