期刊
SCRIPTA MATERIALIA
卷 172, 期 -, 页码 149-153出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.07.024
关键词
Twinning; Plastic deformation; Grain interfaces; Interface defects; Dislocations
类别
资金
- Czech Science Foundation [18-07140S]
- Spanish MINECO [FIS2015-69017-P]
- Ministry of Education, Youth and Sports of the Czech Republic under [Project CEITEC 2020] [LQ1601]
Deformation twins in magnesium exhibit considerable densities of I-1 basal-plane stacking-faults. Since these faults generally transect their host twin, they presumably lengthen concommitantly with boundary migration during twin growth. We investigate this process using atomic-scale simulation for {10 (1) over bar2} and {10 (1) over bar1} twinning. It is demonstrated first that the intersection of a stacking-fault with a stationary twin boundary is delineated by a sessile imperfect disconnection. Subsequently, by applying a shear strain, we stimulate twin growth by the passage of twinning disconnections along twin boundaries, and show that these are able to propagate through such pre-existing imperfect disconnections in a conservative manner. (C) 2019 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.
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