Study of Reversible Motion of {101̅2} Tensile Twin Boundaries in a Magnesium Alloy during Strain Path Changes

Abstract

Twinning process involving reversible motion of twin boundaries was examined and quantified in a rolled Mg-3Al-1Zn magnesium alloy compressed along two perpendicular directions. The evolution of twinning is analyzed by quasi in situ electron backscatter diffraction technique, and the detailed structure of the twin boundary is analyzed using high-resolution transmission electron microscopy technique. The results suggest that both twinning and detwinning are attributed to the mobility of twin boundaries. Low-angle boundaries were identified at the prior twin boundaries after detwinning due to the effect of alloying elements, and these low-angle boundaries will affect subsequent deformation. Twin boundary is serrated and consists of {101̅2} coherent twin boundaries and prism-basal boundaries that control twin boundary migration.

Department(s)

Materials Science and Engineering

Research Center/Lab(s)

Intelligent Systems Center

Keywords and Phrases

Detwinning; Magnesium Alloy; Twin Boundary; Twinning

International Standard Serial Number (ISSN)

0167-577X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2018 Elsevier B.V., All rights reserved.

Publication Date

01 Nov 2018

Link to Full Text

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