|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||Derivation of Non-equiatomic MnFeCoNiCu High Entropy Alloy and its Relation to the Equiatomic Counterpart
||Artashes Ter-Isahakyan, Azin Akbari, Thomas J Balk
|On-Site Speaker (Planned)
For high entropy alloys (HEAs), an equiatomic composition maximizes configurational entropy, but the structure, phase stability and/or mechanical properties are not necessarily optimised. Within an HEA system, the alloy composition that results in the best structure and properties is not necessarily a simple stoichiometric compound. We demonstrate this by first deriving a stable, single-phase non-equiatomic Mn17Fe22Co24Ni24Cu13 HEA composition through equilibrium solidification of an equiatomic CrMnFeCoNiCu alloy. The newly developed alloy, along with its equiatomic counterpart (Mn20Fe20Co20Ni20Cu20) were fabricated by arc melting, and then thermomechanically processed for homogenization. Mechanical properties in tension and thermal stability by high-temperature annealing were also evaluated for comparison of the equiatomic and non-equiatomic HEAs. It was found that the non-equatomic alloy has improved mechanical properties and superior high temperature properties.
||Planned: Supplemental Proceedings volume