Exploring the Formation Mechanism of Deformation Twins in CrMnFeCoNi High Entropy Alloy |
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| Authors: | Junwei Xie Haokai Dong Yuxiu Hao Zhongding Fan Chang-An Wang |
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| Affiliation: | 1.State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;2.National Engineering Research Center of Near‑net‑Shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510641, China |
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| Abstract: | The deformation twins initiated in CrMnFeCoNi high entropy alloy at cryogenic temperature are experimentally studied. Under the external loading, a three-dimensional shear stress concentration originating from dislocation tangling at both the grain boundaries and twin boundaries could be formed, which promotes emission of partial dislocations from the planar defects and is thus considered to be the key factor for twin formation. A sympathetic nucleation mechanism is proposed to describe the nucleation behaviors of twins. |
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| Keywords: | High entropy alloy Deformation twinning Defects Shear stress concentration |
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