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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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https://hal.univ-lorraine.fr/hal-03143131
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Submitted on : Friday, September 23, 2022 - 11:28:11 AM
Last modification on : Friday, September 23, 2022 - 11:28:12 AM

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O. Bouaziz, Jongun Moon, Hyoung Seop 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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