|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||J-62: Static and Dynamic Mechanical Performance of Non-equiatomic CoCrFeMnNi HEA
||Kyle Rozman, Paul Jablonski, Jeffrey Hawk, Michael Gao
|On-Site Speaker (Planned)
High entropy alloys (HEAs) are a new class of materials exploiting entropy of mixing to stabilize the microstructure. Equiatomic CoCrFeMnNi is of considerable interest. Mechanical performance of this alloy has low yield strength and strain hardens significantly. The question arises: Does an equiatomic formulation result in the best performance? This research focuses on a variant of CoCrFeMnNi with a lower proportion of Mn, ~5% atomic with the balance being equiatomic. Surprisingly, the lower Mn variant was predicted to have a higher entropy than the equiatomic alloy based on CALPHAD calculations. Static tensile behavior from room temperature to 800℃ is discussed. Additionally, room temperature high cycle fatigue tests were conducted, and results are discussed and compared with results of CoCrFeMnNi alloy where appropriate.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume