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Isotropic and kinematic hardening of a high entropy alloy

Abstract : The contribution of kinematic hardening to the overall strain hardening of a high entropy alloy (HEA) was investigated for the first time ever. It was assessed for a single-phase equiatomic CoCrFeMnNi alloy based on a study of the Bauschinger effect. The observed occurrence of high back stresses signifies substantial kinematic hardening. We attribute it to the low probability of cross-slip in this HEA which, however, rises in the process of straining. A model that captures the mentioned effects was proposed and validated.
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Contributor : Olivier Bouaziz <>
Submitted on : Tuesday, February 16, 2021 - 3:48:12 PM
Last modification on : Friday, March 12, 2021 - 3:21:28 AM



O. Bouaziz, Jongun Moon, Hyoung Kim, Yuri Estrin. Isotropic and kinematic hardening of a high entropy alloy. Scripta Materialia, Elsevier, 2021, 191, pp.107-110. ⟨10.1016/j.scriptamat.2020.09.022⟩. ⟨hal-03143131⟩



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