Kink Formation Process in Long-Period Stacking Ordered Mg-Zn-Y Alloy

被引：59

作者：

Yamasaki, Shigeto ^{[1
]}

Tokuzumi, Tsubasa ^{[2
]}

Li, Wansong ^{[1
]}

Mitsuhara, Masatoshi ^{[1
]}

Hagihara, Koji ^{[3
]}

Fujii, Toshiyuki ^{[4
]}

Nakashima, Hideharu ^{[1
]}

机构：

[1] Kyushu Univ, Fac Engn Sci, Kasuga, Fukuoka 8168580, Japan

[2] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Kasuga, Fukuoka 8168580, Japan

[3] Osaka Univ, Grad Sch Engn, Dept Adapt Machine Syst, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

[4] Tokyo Inst Technol, Sch Mat & Chem Technol, Meguro Ku, Tokyo 1528552, Japan

来源：

ACTA MATERIALIA | 2020年 / 195卷

基金：

日本学术振兴会;

关键词：

Magnesium alloys; Long-period stacking ordered structure; Mille-feuille structure; Kink deformation; Electron backscattering diffraction (EBSD); ROOM-TEMPERATURE DEFORMATION; PLASTIC-DEFORMATION; LPSO PHASE; BANDS; MICROSTRUCTURE; BOUNDARIES; BEHAVIOR; DISLOCATIONS; STRENGTH;

D O I：

10.1016/j.actamat.2020.04.051

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The formation process of the kink bands in a directionally solidified, polycrystalline, long-period stacking ordered (LPSO) Mg85Zn6Y9 phase during compression deformation was investigated. In-situ compression observations by scanning electron microscopy and electron backscattered diffraction analysis revealed that regions with localized crystal orientation rotation appeared before ridge kinks formed as surface relief. In this paper, it is called as pre-kink The observed pre-kinks were composed of two separate regions rotated in opposite directions to each other and distinguished from one another by the three boundaries. A transmission electron microscopy observation revealed that the boundaries of the pre-kink are sub-boundaries consisting of edge dislocation array, and both its ends are terminated within the matrix. These characteristics match the reported that of regular ridge kink boundaries. In addition, while pre-kinks do not possess the ability of complete reversibility, its boundaries are capable of moving elastically. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：25 / 34

页数：10

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