Interactions between long-period stacking ordered phase and β′ precipitate in Mg-Gd-Y-Zn-Zr alloy: Atomic-scale insights from HAADF-STEM

被引：40

作者：

Zheng, Jingxu ^{[1
,2
]}

Chen, Bin ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Frontier Res Ctr Mat Struct, Shanghai 200030, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200030, Peoples R China

来源：

MATERIALS LETTERS | 2016年 / 176卷

基金：

中国国家自然科学基金;

关键词：

Metals and alloys; Phase transformation; Microstructure; Interfaces; Electron microscopy;

D O I：

10.1016/j.matlet.2016.04.114

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper reports on an atomic-scale investigation into the interactions between beta' precipitates and long-period stacking ordered phase (LPSO) in Mg-10Gd-5Y-2Zn-0.5Zr (wt%) alloy, using Cs-corrected high angle annular dark field-scanning transmission electron microscopy (HAADF-STEM). The general morphology within the alloy is LPSO phase intercalated with beta' precipitates and the two structures interconnect into a 3-D network. The beta'/LPSO interactions are fully characterized and categorized into three types: RE-absent gaps parallel to (11 (2) over bar0)(Mg), redistributions of heavy atoms within LPSO structures and interceptions of beta' precipitates by LPSO structures from [10 (1) over bar0](Mg) direction. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：223 / 227

页数：5

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