Deformation twinning mechanism in hexagonal-close-packed crystals

被引：17
|
作者：
Jiang, Shan [1 ]
Jiang, Zhongtao [1 ]
Chen, Qiaowang [1 ]
机构：
[1] Chongqing Univ Arts & Sci, Res Inst New Mat & Technol, Chongqing 402160, Peoples R China
来源：
SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期
基金：
中国国家自然科学基金;
关键词：
ATOMIC MOTION; DISLOCATIONS; TWINS; CRYSTALLOGRAPHY; 10(1)OVER-BAR1; INTERFACES; BOUNDARIES; GROWTH; MODEL;
D O I：
10.1038/s41598-018-37067-8
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The atomic structure of {10 (1) over bar 2} twin boundary (TB) from a deformed Mg-3Al-1Zn (AZ31) magnesium alloy was examined by using high-resolution transmission electron microscopy (HRTEM). By comparing the lattice structure of TB with the previously established model, a kind of special atomic combinations, here named primitive cells (PCs), were discovered at the TB. The PCs reorientation induced mechanism of twinning in hexagonal-close-packed (HCP) crystals was hence verificated. Meanwhile, the relationship between the misorientation of adjacent layers of PCs and the width of TB was discussed. The verification of the mechanism clarifies the twinning mechanism in HCP crystals and opens up opportunities for further researches.
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页数：5
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