Journal
SCRIPTA MATERIALIA
Volume 191, Issue -, Pages 107-110Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2020.09.022
Keywords
High entropy alloys; Isotropic hardening; Kinematic hardening; Back stress; Bauschinger effect
Categories
Funding
- National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2016M3D1A1023384]
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The contribution of kinematic hardening to the overall strain hardening of a high entropy alloy was investigated for the first time. The observed occurrence of high back stresses signifies substantial kinematic hardening, attributed to the low probability of cross-slip in the alloy. A model capturing these effects was proposed and validated.
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. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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