Isotropic and kinematic hardening of a high entropy alloy

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 01 Jan 2020 English Publisher:Elsevier BVJournal:Scripta Materialia, volume 191, pages 107-110 (issn: 1359-6462,

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Authors: Olivier Bouaziz; Jongun Moon; Hyoung Seop Kim; Yuri Estrin;

doi: 10.1016/j.scriptamat.2020.09.022 , 10.2139/ssrn.3683600

Isotropic and kinematic hardening of a high entropy alloy

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Abstract

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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