Characteristic dislocation substructure in {10(1)over-bar2} twins in hexagonal metals

被引：54

作者：

Wang, F. ^{[1
]}

Hazeli, K. ^{[2
]}

Molodov, K. D. ^{[3
]}

Barrett, C. D. ^{[4
,5
]}

Al-Samman, T. ^{[3
]}

Molodov, D. A. ^{[3
]}

Kontsos, A. ^{[6
]}

Ramesh, K. T. ^{[7
]}

El Kadiri, H. ^{[5
]}

Agnew, S. R. ^{[1
]}

机构：

[1] Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA

[2] Univ Alabama, Dept Mech & Aerosp Engn, Huntsville, AL 35899 USA

[3] Rhein Westfal TH Aachen, Inst Phys Met & Met Phys, D-52056 Aachen, Germany

[4] Mississippi State Univ, Ctr Adv Vehicular Syst, Starkville, MS 39759 USA

[5] Mississippi State Univ, Dept Mech Engn, Starkville, MS 39759 USA

[6] Drexel Univ, Dept Mech Engn & Mech, Philadelphia, PA 19104 USA

[7] Johns Hopkins Univ, Hopkins Extreme Mat Inst, Baltimore, MD 21218 USA

来源：

SCRIPTA MATERIALIA | 2018年 / 143卷

基金：

美国国家科学基金会;

关键词：

Single crystal; Twinning; Dislocation; Fault; Plasticity; PLANE-STRAIN COMPRESSION; MAGNESIUM ALLOY; STACKING-FAULTS; ELECTRON-MICROSCOPY; DEFORMATION TWINS; ZINC-CRYSTALS; EVOLUTION; BOUNDARY; MG; TRANSMUTATION;

D O I：

10.1016/j.scriptamat.2017.09.015

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：81 / 85

页数：5

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