About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond V
|
| Presentation Title |
Compositionally Complex Lightweight Refractory Alloys Designed to Exhibit Ductility |
| Author(s) |
Joseph Poon, Diego Ibarra, Peter Connors, Jie Qi, Samuel Inman, Xuesong Fan, Jishnu Bhattacharyya, Debashish Sur, Michael Widom, Sean Agnew, John Scully, Peter Liaw |
| On-Site Speaker (Planned) |
Joseph Poon |
| Abstract Scope |
Refractory alloys have high melting temperatures and attractive structural and functional properties. We employ adaptive design integrating computation and experiment to explore Compositionally Complex Refractory Alloys (CCRAs) with low densities potentially below 5 g/cc, while having yield strengths and toughness comparable to or better than those of conventional structural alloys. High-throughput machine-learning (ML) models implemented with active learning are shown to give accurate phase prediction with errors below 10%. ML coupled with Monte Carlo simulation reveals the effect of disorder on ductility. Our approach is shown to yield some low-density, low-cost, and ductile CCRAs with the potential for further discoveries. |