About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Advances in Refractory High Entropy Alloys and Ceramics
|
| Presentation Title |
Compositional Emptiness as a Guide to Alloy Discovery |
| Author(s) |
Stéphane Gorsse, Daniel B. Miracle |
| On-Site Speaker (Planned) |
Daniel B. Miracle |
| Abstract Scope |
After over 20 years of intense study, there is not yet a compelling high entropy alloy (HEA) application. To explain this, recent work has demonstrated that most HEAs are compositionally similar to many commercial alloys, especially those based on 3d transition metals. This similarity is established by calculating and analyzing the compositional distances between nearly 1500 commercial alloys and HEAs. More detailed analysis shows that three principal elements are sufficient to achieve exceptional properties, and that one of those elements typically reach concentrations as high as 75 at.%. Here, we briefly review these findings as an introduction to a compositional emptiness analysis. This new approach identifies regions of multicomponent composition space that are farthest from commercial alloys and current HEAs. This analysis emphasizes compositional emptiness in the refractory element domain, to guide future work on RHEAs toward areas as yet untouched by both conventional alloys and the HEA approach. |