On the 101¯2 “twinning shear” measured from line deflection
On the 101¯2 “twinning shear” measured from line deflection
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DOI：
10.1016/j.scriptamat.2018.09.027
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发表时间：
2019-01
影响因子：
6
通讯作者：
Xianhe Zhang;Bin Li;Q. Sun
中科院分区：
文献类型：
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作者：
Xianhe Zhang;Bin Li;Q. Sun
最近对镁中10 1 <$2 10 1 <$1 <$模式的“孪生剪切”的实验测量报告了12.6%的值，这接近于理论值。测量是基于观察线偏转横跨一个双边界。在这里，我们证明了线偏转仅仅是变形孪晶中晶格变换的结果，并且即使在孪晶平面上没有均匀的简单剪切发生时也会发生，这正是10 1 <$2 10 1 <$1 <$模的情况。晶格对应分析和高分辨透射电子显微镜观察不同取向差角的非相干孪晶界验证了我们的结论。
A recent experimental measurement of the “twinning shear” of 10 1¯ 2 10 1¯ 1¯ 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¯ 2 10 1¯ 1¯ 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.