The {101¯2} non-cozone twin-twin interactions in Mg: A stability and mobility study using 3-D atomistic simulations
Due to easy activation of tensile twinning in Mg, multiple {101¯2} twin variants can interact with each other and form twin-twin boundaries over the course of plastic deformation. Previous studies using 2-D settings provide only a partial understanding of these interactions, especially the non-cozon...
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Published in | Scripta materialia Vol. 200; no. C; p. 113913 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
United States
Elsevier Ltd
15.07.2021
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Due to easy activation of tensile twinning in Mg, multiple {101¯2} twin variants can interact with each other and form twin-twin boundaries over the course of plastic deformation. Previous studies using 2-D settings provide only a partial understanding of these interactions, especially the non-cozone ones. Here, atomistic simulations are used to study the 3-D structural characteristic and evolution of the non-cozone {101¯2} twin-twin junctions. The study reveals the existence of new twin-twin boundaries (TTBs) such as TTBBP and TTBK2, formed after the interaction between the basal prismatic and conjugate twin interfaces with the coherent twin boundary. For both non-cozone twin-twin interactions, the {1¯21¯2} TTB and its associated twin-twin junctions are found to play a major role in the {101¯2} twin's stability and mobility. Specifically, they promote the growth of the 3-D twin in both the normal and forward directions during the interaction and hinder the detwinning process upon unloading.
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Bibliography: | USDOE Office of Science (SC), Basic Energy Sciences (BES) |
ISSN: | 1359-6462 1872-8456 |
DOI: | 10.1016/j.scriptamat.2021.113913 |