Incoherent tilt grain boundaries stabilized by stacking faults and solute-cluster segregation: a case-study of an Mg-Gd alloy

Zhengqing Liu; Qi Qian; Yong Jiang; Yiren Wang; Yuman Zhu; Jian-Feng Nie

doi:10.1080/21663831.2020.1748734

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Incoherent tilt grain boundaries stabilized by stacking faults and solute-cluster segregation: a case-study of an Mg-Gd alloy

Report | 更新时间：2026-08-19

- Incoherent tilt grain boundaries stabilized by stacking faults and solute-cluster segregation: a case-study of an Mg-Gd alloy
- Materials Research Letters Vol. 8, Issue 7, Pages: 268-274(2020)
- 作者机构：
  
  1. State Key Laboratory for Powder Metallurgy School of Materials Science and Engineering Central South University
  2. Department of Materials Science and Engineering Monash University
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2020.1748734
  CLC：
- Online First：20 April 2020，
  
  Published：2020
- 稿件说明：
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Zhengqing Liu, Qi Qian, Yong Jiang, et al. Incoherent tilt grain boundaries stabilized by stacking faults and solute-cluster segregation: a case-study of an Mg-Gd alloy[J]. Materials Research Letters, 2020, 8(7): 268-274.
DOI：

Zhengqing Liu, Qi Qian, Yong Jiang, et al. Incoherent tilt grain boundaries stabilized by stacking faults and solute-cluster segregation: a case-study of an Mg-Gd alloy[J]. Materials Research Letters, 2020, 8(7): 268-274. DOI： 10.1080/21663831.2020.1748734.

摘要

Abstract

BSTRACTDespite their wide presence in hcp metals

incoherent tilt grain boundaries (ITGBs) are rarely studied. In this work

first-principles calculations were combined with atomic-resolution HAADF-STEM analyses to investigate the structure and formation of one special type ITGB in an Mg-Gd alloy featured with a unique Gd-rich cluster segregation pattern. Our results suggested this ITGB as a mirror-glide boundary formed by gliding the atoms along [202¯1¯] of a {101¯4}202¯1¯ coherent twin boundary due to its interaction with stacking faults. The ITGB can be further stabilized by partial-column Gd substitution

leading to the observed unique segregation pattern.

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Related Institution

b Hong Kong Polytechnic University Shenzhen Research Institute

a Research Institute for Advanced Manufacturing Department of Industrial and Systems Engineering The Hong Kong Polytechnic University Kowloon Hong Kong People's Republic of China

c School of Mechanical and Automotive Engineering South China University of Technology

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a National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite Shanghai Jiao Tong University

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