Pure-Shuffle Nucleation of Deformation Twins in Hexagonal-Close-Packed Metals

被引：193

作者：

Wang, J. ^{[1
]}

Yadav, S. K. ^{[1
]}

Hirth, J. P. ^{[2
]}

Tome, C. N. ^{[1
]}

Beyerlein, I. J. ^{[3
]}

机构：

[1] Los Alamos Natl Lab, MST 8, Los Alamos, NM 87545 USA

[2] Los Alamos Natl Lab, MPA CINT, Los Alamos, NM 87545 USA

[3] Los Alamos Natl Lab, T-3, Los Alamos, NM 87545 USA

来源：

MATERIALS RESEARCH LETTERS | 2013年 / 1卷 / 03期

关键词：

Twin Nucleation; Pure-Shuffle; Grain Boundary; Magnesium; Atomistic Simulations;

D O I：

10.1080/21663831.2013.792019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The propagation of deformation twins in hexagonal-close-packed metals is commonly described by a conventional glide-shuffle mechanism. The widely accepted convention is that this process is also responsible for twin nucleation, but lacks direct confirmation. Using atomistic simulations, we identify an unconventional pure-shuffle mechanism for the nucleation of ((1) over tilde 012) twins, which then grow through the conventional glide-shuffle mechanism entailing the glide of twinning disconnections. The pure-shuffle nucleation of twins at grain boundaries can be ascribed to a high-stress concentration and pre-existing grain boundary dislocations.

引用

页码：126 / 132

页数：7

共 40 条

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