In-situ atomic-scale observation of dislocation and deformation twin interaction in FeMnCoCr high-entropy alloy

Yan Ma; Keliang Qiu; Ning Xu; Chengpeng Yang; Jiabao Zhang; Zihao Zhang; Qingsong Deng; Yonghai Yue; Lihua Wang; Xiaodong Han

doi:10.1080/21663831.2023.2275600

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In-situ atomic-scale observation of dislocation and deformation twin interaction in FeMnCoCr high-entropy alloy

Original reports | 更新时间：2026-08-19

- In-situ atomic-scale observation of dislocation and deformation twin interaction in FeMnCoCr high-entropy alloy
- Materials Research Letters Vol. 11, Issue 12, Pages: 1040-1047(2023)
- 作者机构：
  
  1. a Faculty of Materials and Manufacturing Beijing University of Technology
  2. b School of Chemistry Beihang University
  3. c Branch of Iron and Steel Research Institute Ansteel Beijing Research Institute Co. Ltd.
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2023.2275600
  CLC：
- Online First：09 November 2023，
  
  Published：2023
- 稿件说明：
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Yan Ma, Keliang Qiu, Ning Xu, et al. In-situ atomic-scale observation of dislocation and deformation twin interaction in FeMnCoCr high-entropy alloy[J]. Materials Research Letters, 2023, 11(12): 1040-1047.
DOI：

Yan Ma, Keliang Qiu, Ning Xu, et al. In-situ atomic-scale observation of dislocation and deformation twin interaction in FeMnCoCr high-entropy alloy[J]. Materials Research Letters, 2023, 11(12): 1040-1047. DOI： 10.1080/21663831.2023.2275600.

摘要

Abstract

The deformation of a single-crystal Fe

alloy is captured in situ at the atomic scale. The results show that full and partial dislocations

along with deformation twins

are involved in the deformation process. Partial dislocation activities result in the formation of nanotwins

high-density coherent twin boundaries

and incoherent twin boundaries. Full dislocations interact with the coherent/incoherent twin boundaries

and partial dislocations

thereby producing high strength and remarkable strain hardening. The observed high activity of full dislocations can be attributed to the inhomogeneous distribution of solid solution atoms in the alloy.

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Related Institution

Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons Forschungszentrum Jülich GmbH

a China Nuclear Power Technology Research Institute

b Center for Advancing Materials Performance from the Nanoscale State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University

c Department of Materials Science and Engineering University of Hong Kong Hong Kong People's Republic of China

d Department of Mechanical Engineering City University of Hong Kong

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