Twinning and double twinning upon compression of prismatic textures in an AM30 magnesium alloy

被引：60
作者：
Ma, Q. [1 ]
El Kadiri, H. [1 ,2 ]
Oppedal, A. L. [1 ]
Baird, J. C. [1 ]
Horstemeyer, M. F. [1 ,2 ]
Cherkaoui, M. [3 ]
机构：
[1] Mississippi State Univ, Ctr Adv Vehicular Syst, Mississippi State, MS 39762 USA
[2] Mississippi State Univ, Dept Mech Engn, Mississippi State, MS 39762 USA
[3] Georgia Inst Technol, Sch Aerosp & Mech Engn, Atlanta, GA 30332 USA
来源：
SCRIPTA MATERIALIA | 2011年 / 64卷 / 09期
关键词：
Magnesium alloy; Texture; EBSD; Twinning; Plasticity; DUCTILITY; FRACTURE;
D O I：
10.1016/j.scriptamat.2011.01.003
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Twinning mechanisms in a {1 0 (1) over bar 0}-fiber texture of an AM30 magnesium alloy were studied under profuse and nominal {1 0 (1) over bar 2} twinning conditions produced by different compression orientations. While {1 0 (1) over bar 2} twins took the form of fully residual twins upon profuse conditions, they were "stopped elastic" twins upon nominal conditions. Profuse nucleation of {1 0 (1) over bar 1} {1 0 (1) over bar 2} and {1 0 (1) over bar 3}-{1 0 (1) over bar 2} double twins occurred as a two-shear mode mechanism which substantiated Crocker's theory of double twinning. These two double twinning modes played an important role in rushing sample fracture. CD (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：813 / 816
页数：4
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