Effects of Zn addition on microstructure and mechanical properties of as-cast Mg-Dy alloy

被引：0

作者：

Bi, Guang-Li ^{[1
]}

Li, Yuan-Dong ^{[1
]}

Huang, Xiao-Feng ^{[1
]}

Chen, Ti-Jun ^{[1
]}

Ma, Ying ^{[1
]}

Hao, Yuan ^{[1
]}

机构：

[1] State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou,730050, China

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2015年 / 25卷 / 04期

关键词：

Heat treatment - Dysprosium alloys - Magnesium alloys - Tensile strength - Aging of materials - Precipitation (chemical) - Ternary alloys - Zinc alloys;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The effects of Zn addition on the microstructure, aging behavior and mechanical properties of as-cast Mg-Dy alloy were investigated. The results show that the lamellar Mg12ZnDy phase with a 18R-type long period stacking ordered (LPSO) structure and coarse Mg3Zn3Dy2 phase precipitate in the alloy, respectively, when 0.5% and 1% (mole fraction) Zn are added. Simultaneously, the grains of the alloy are refined with increasing Zn content. After solution heat treatment, the 18R-type LPSO phase transforms to a strip-like 14H-type LPSO structure distributing in the grain interior. In addition, the (Mg, Zn)xDy phase forms and the volume fraction of Mg3Zn3Dy2 phase decreases. 0.5% Zn addition improves the aging behavior and strengthens the tensile strengths at room temperature and 200℃. ©, 2015, Central South University of Technology. All right reserved.

引用

页码：875 / 882