On the {10(1)over-bar2} twinning shear measured from line deflection

SCRIPTA MATERIALIA

卷:159

Article

Zhang, X. Y.¹  Li, B.^2,4  Sun, Q.³ 

[1] Chongqing Univ, Sch Mat Sci & Engn, Chongqing, Peoples R China

[2] Univ Nevada, Dept Chem & Mat Engn, Reno, NV 89557 USA

[3] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Chengdu, Sichuan, Peoples R China

[4] Univ Nevada, Nevada Inst Sustainabil, Reno, NV 89557 USA

关键词: Magnesium;    Twinning;    Twinning shear;   

DOI  :  10.1016/j.scriptamat.2018.09.027

来源: Elsevier

【 摘 要 】

A recent experimental measurement of the twinning shear of {10 (1) over bar2}< 10 (11) over bar > mode in magnesium reported a value of 12.6%, which is close to the theoretical value. The measurement was based on observation of line deflection across a twin boundary. Here we demonstrate that line deflection is solely a result of lattice transformation in deformation twinning, and can happen even when no homogeneous simple shear occurs on the twinning plane, which is exactly the case for {10 (1) over bar2}< 10 (11) over bar > mode. Lattice correspondence analysis and high resolution transmission electron microscopy observations of incoherent twin boundaries with different misorientation angles are presented to validate our conclusion. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free