Dislocation array reflection enhances strain hardening of a dual-phase heterostructured high-entropy alloy

Yi Liu; Mengning Xu; Lirong Xiao; Xuefei Chen; Zhaohua Hu; Bo Gao; Ningning Liang; Yuntian Zhu; Yang Cao; Hao Zhou

doi:10.1080/21663831.2023.2208166

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Dislocation array reflection enhances strain hardening of a dual-phase heterostructured high-entropy alloy

Report | 更新时间：2026-08-19

- Dislocation array reflection enhances strain hardening of a dual-phase heterostructured high-entropy alloy
- Materials Research Letters Vol. 11, Issue 8, Pages: 638-647(2023)
- 作者机构：
  
  1. a Nano and Heterogeneous Materials Center School of Materials Science and Engineering Nanjing University of Science and Technology
  2. b School of Materials Science and Engineering Jiangsu University
  3. c Ansteel Beijing Research Institute Co. Ltd.
  4. d Department of Materials Science and Engineering City University of Hong Kong
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2023.2208166
  CLC：
- Online First：09 May 2023，
  
  Published：2023
- 稿件说明：
移动端阅览
Yi Liu, Mengning Xu, Lirong Xiao, et al. Dislocation array reflection enhances strain hardening of a dual-phase heterostructured high-entropy alloy[J]. Materials Research Letters, 2023, 11(8): 638-647.
DOI：

Yi Liu, Mengning Xu, Lirong Xiao, et al. Dislocation array reflection enhances strain hardening of a dual-phase heterostructured high-entropy alloy[J]. Materials Research Letters, 2023, 11(8): 638-647. DOI： 10.1080/21663831.2023.2208166.

摘要

Abstract

Piling-ups of geometrically necessary dislocation (GND) arrays against interfaces are known to produce hetero-deformation induced (HDI) strengthening and strain hardening to enhance the strength and ductility of heterostructured materials. Here we report an interesting dislocation mechanism that can produce strong HDI hardening: consecutive reflections of GND planar piling-up arrays near the opposite phase boundaries in a heterostructured AlCoCrFeNi

high entropy alloy (HEA). In contrast

dislocation transmission was found at grain boundaries in the fcc phase. The discovery here provides guidance for future materials design

which may improve the combination of strength and ductility of metallic materials.

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