The effect of LPSO on the deformation mechanism of Mg-Gd-Y-Zn-Zr magnesium alloy

被引：44

作者：

Shao, Jianbo ^{[1
]}

Chen, Zhiyong ^{[1
]}

Chen, Tao ^{[1
]}

Hu, Zhang ^{[1
]}

Zhou, Xiaojie ^{[1
]}

Liu, Chuming ^{[1
]}

机构：

[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

来源：

JOURNAL OF MAGNESIUM AND ALLOYS | 2016年 / 4卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Rare earth magnesium alloys; LPSO; Deformation mechanism; Crystal orientation; STACKING-FAULTS; PERIOD; 14H; 18R;

D O I：

10.1016/j.jma.2016.03.001

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The tensile deformation behavior and corresponding microstructure evolution of the Mg-4.7Gd-3.4Y-1.2Zn-0.5Zr (at. %) magnesium alloy with long period stacking structure (LPSO) are studied by electron backscatter diffraction (EBSD) and slip lines methods. The results show that less and very small size of twins is observed in the grains with high value of Schmid factor for twinning, which indicates that the growth of the {10-12} twinning deformation is prevented by the LPSO phase. The prismatic lines present in grains of which the prismatic slip Schmid factor is above 0.4. The favorable orientation and LPSO phase synergistically promote the activation of prismatic slip. The inhomogeneous rotation of the grains during deformation is the reason for the microcrack at grain boundary. (C) 2016 Production and hosting by Elsevier B.V. on behalf of Chongqing University.

引用

页码：83 / 88

页数：6

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