Twin-like fault in Mg-9.8 wt%Sn alloy

被引：14
|
作者：
Liu, Chaoqiang [1 ,2 ]
Chen, Houwen [1 ,3 ]
Wilson, Nick [4 ]
Nie, Jian-Feng [1 ,2 ,3 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Int Joint Lab Light Alloys, Minist Educ, Chongqing 400044, Peoples R China
[2] Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia
[3] Chongqing Univ, Electron Microscopy Ctr, Chongqing 400044, Peoples R China
[4] CSIRO Mfg, Clayton, Vic 3168, Australia
来源：
SCRIPTA MATERIALIA | 2018年 / 155卷
基金：
澳大利亚研究理事会; 中国国家自然科学基金;
关键词：
Magnesium alloys; Stacking fault; Segregation; HAADF-STEM; DFT; AUGMENTED-WAVE METHOD; STACKING-FAULTS; ELECTRON-IRRADIATION; AB-INITIO; MAGNESIUM; 1ST-PRINCIPLES; ENERGY; SEGREGATION; VACANCIES; ZN;
D O I：
10.1016/j.scriptamat.2018.06.018
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Stacking faults in magnesium alloys have received considerable attention in recent years, but only intrinsic and extrinsic faults are studied at experimental and computational levels. Twin-like fault, designated as T-2 fault, has received little attention. In this study, we report for the first time the occurrence of T-2 fault in Mg-9.8 wt% Sn alloy. The T-2 fault and solute segregation in regions surrounding the fault were characterized using aberration-corrected scanning transmission electron microscopy and first-principles calculations. Sn atoms orderly distribute in the fault plane and its neighbouring planes, which drastically decreases the T-2 fault energy. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：89 / 93
页数：5
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