Characteristic dislocation substructure in {10(1)over-bar2} twins in hexagonal metals
Characteristic dislocation substructure in {10(1)over-bar2} twins in hexagonal metals
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DOI：
10.1016/j.scriptamat.2017.09.015
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发表时间：
2018-01-15
影响因子：
6
通讯作者：
Agnew, S. R.
中科院分区：
文献类型：
--
作者：
Wang, F.;Hazeli, K.;Agnew, S. R.
基于本研究中纯Mg单晶的透射电镜结果，以及文献中Mg合金和其他六方金属的透射电镜结果，在{10 (1)over bar2}孪晶中发现了一个特征性的位错亚结构。丰富的非基底[c]和< c + a >完美位错以及宽度在100 nm左右的基底Li层错优先分布在孪晶界附近，孪晶界中间有一个低密度带。考虑到{10 (1)over bar2}孪晶的普遍存在，这种特征性的位错子结构应在六边形金属合金变形建模中加以考虑。(C) 2017材料学报Elsevier Ltd.出版。版权所有。
Based on transmission electron microscopy results from pure Mg single crystal examined in the current work, and Mg alloys and other hexagonal metals in literature, a characteristic dislocation substructure inside {10 (1) over bar2} twins is identified. Abundant non-basal [c] and < c + a > perfect dislocations, as well as basal Li stacking faults with widths on the order of 100 nm distributed preferentially in the vicinity of a twin boundary, with a low density zone in the middle of the twin. Considering the ubiquity of {10 (1) over bar2} twins, this characteristic dislocation substructure should be considered in modeling of hexagonal metal alloy deformation. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.