Twin-coupled shear bands in an ultrafine-grained CoCrFeMnNi high-entropy alloy deformed at 77K

Xiyao Li; Shijie Sun; Yu Zou; Qi Zhu; Yanzhong Tian; Jiangwei Wang

doi:10.1080/21663831.2022.2053220

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Twin-coupled shear bands in an ultrafine-grained CoCrFeMnNi high-entropy alloy deformed at 77K

Original Reports | 更新时间：2026-08-19

- Twin-coupled shear bands in an ultrafine-grained CoCrFeMnNi high-entropy alloy deformed at 77K
- Materials Research Letters Vol. 10, Issue 6, Pages: 385-391(2022)
- 作者机构：
  
  1. a Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou People’s Republic of China
  2. b Wenzhou Key Laboratory of Novel Optoelectronic and Nano Materials Institute of Wenzhou Zhejiang University
  3. Shi-changxu Innovation Center for Advanced Materials Institute of Metal Research Chinese Academy of Sciences,c
  4. d Department of Materials Science and Engineering University of Toronto
  5. e School of Mechanical and Aerospace Engineering College of Engineering Nanyang Technological University
  6. f Key Laboratory for Anisotropy and Texture of Materials Ministry of Education School of Materials Science and Engineering Northeastern University
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2022.2053220
  CLC：
- Online First：30 March 2022，
  
  Published：2022
- 稿件说明：
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Xiyao Li, Shijie Sun, Yu Zou, et al. Twin-coupled shear bands in an ultrafine-grained CoCrFeMnNi high-entropy alloy deformed at 77K[J]. Materials Research Letters, 2022, 10(6): 385-391.
DOI：

Xiyao Li, Shijie Sun, Yu Zou, et al. Twin-coupled shear bands in an ultrafine-grained CoCrFeMnNi high-entropy alloy deformed at 77K[J]. Materials Research Letters, 2022, 10(6): 385-391. DOI： 10.1080/21663831.2022.2053220.

摘要

BSTRACTTwo different types of shear bands generate in ultrafine-grained (UFG) CoCrFeMnNi high-entropy alloys deformed at 77 K

i.e. commonly-observed low angle grain boundary (LAGB) type and unusual twin-coupled type. Twin-coupled shear bands exhibit a misorientation of 56–67° with the matrix

in contrast to the LAGB shear band with a misorientation of 6–12°. Both annealing twins and deformation twins can act as precursor for twin-coupled shear bands

where dislocation accumulation along twin boundaries can tune the orientation of twin lamella. These observations suggest that twin-coupled shear bands can act as an important plastic carrier in materials deformed under extreme conditions.

Abstract

BSTRACTTwo different types of shear bands generate in ultrafine-grained (UFG) CoCrFeMnNi high-entropy alloys deformed at 77 K

i.e. commonly-observed low angle grain boundary (LAGB) type and unusual twin-coupled type. Twin-coupled shear bands exhibit a misorientation of 56–67° with the matrix

in contrast to the LAGB shear band with a misorientation of 6–12°. Both annealing twins and deformation twins can act as precursor for twin-coupled shear bands

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Related Institution

f Harbin Institute of Technology Suzhou Research Institute

e College of Materials Science and Engineering Taiyuan University of Technology

d School of Materials Science and Engineering Dalian University of Technology

c Department of Mechanical Engineering Nagaoka University of Technology

b School of Materials Science and Engineering Harbin Institute of Technology

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