About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
|
High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond II
|
Presentation Title |
Radiation Effects in High Entropy Alloys |
Author(s) |
Shradha Agarwal, Steven J. Zinkle |
On-Site Speaker (Planned) |
Shradha Agarwal |
Abstract Scope |
This talk assesses radiation effects research on concentrated solid solution/high-entropy-alloys (HEAs) with critical insight into conclusions drawn and implications regarding phase stability and mechanical performance. In general, HEAs are claimed to possess high radiation resistance versus conventional alloys, reportedly due to concentrated solid solution alloy effects, phase decomposition, sluggish diffusion, or changes in displacement cascade dynamics and defect energetics. For instance, it has been suggested that the reduced thermal conductivities generally possessed by HEAs may prolong the thermal spike and change the size and shape of the cascade, leading to more opportunity for defect recombination. In general, variable radiation resistance is observed for HEAs compared to conventional alloys and sweeping claims of superior radiation resistance for all HEAs are not justified. However, several HEAs appear to exhibit impressive radiation resistance, and understanding the responsible fundamental mechanisms may lead to design of improved structural alloys. |