Ultrastrong Mg Alloy via Nano-spaced Stacking Faults

被引：319

作者：

Jian, W. W. ^{[1
]}

Cheng, G. M. ^{[1
]}

Xu, W. Z. ^{[1
]}

Yuan, H. ^{[1
]}

Tsai, M. H. ^{[1
]}

Wang, Q. D. ^{[2
]}

Koch, C. C. ^{[1
]}

Zhu, Y. T. ^{[1
]}

Mathaudhu, S. N. ^{[1
,3
]}

机构：

[1] North Carolina State Univ, Dept Mat Sci & Engn, Box 7907, Raleigh, NC 27695 USA

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

[3] US Army, Mat Sci Div, Res Off, Res Triangle Pk, NC 27709 USA

来源：

MATERIALS RESEARCH LETTERS | 2013年 / 1卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Stacking Faults; Mg; Strength; Ductility; Dislocations;

D O I：

10.1080/21663831.2013.765927

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mg alloys are among the lightest alloys but they are usually weak. Here we report a new mechanism to make them ultrastrong while maintaining good ductility. Stacking faults with nanoscale spacing were introduced into a Mg-8.5Gd-2.3Y-1.8Ag-0.4Zr (wt%) alloy by conventional hot rolling, which produced a yield strength of similar to 575 MPa, an ultimate strength of similar to 600 MPa, and a uniform elongation of similar to 5.2 %. Low stacking fault (SF) energy enabled the introduction of a high density of SFs, which impeded dislocation slip and promoted dislocation accumulation. These findings provide guidance for developing Mg alloys with superior mechanical properties.

引用

页码：61 / 66

页数：6

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