Study of Mg-Ymm-Zn alloys with high-strength at elevated temperatures processed by water-cooled mold casting

被引：13

作者：

Zhang, Jinghuai ^{[1
]}

Xu, Longjiang ^{[1
]}

Jiao, Yufeng ^{[1
,2
]}

Xu, Chi ^{[1
]}

Zhang, Li ^{[1
]}

Liu, Shujuan ^{[3
]}

Meng, Jian ^{[4
]}

Wu, Ruizhi ^{[1
]}

Zhang, Milin ^{[1
]}

机构：

[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Peoples R China

[2] Jiamusi Univ, Coll Mat Sci & Engn, Jiamusi 154007, Peoples R China

[3] Harbin Inst Technol, Dept Mat Phys & Chem, Harbin 150001, Peoples R China

[4] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resources Utilizat, Changchun 130022, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2014年 / 610卷

基金：

中国国家自然科学基金; 黑龙江省自然科学基金;

关键词：

Mg alloys; Microstructure; Tensile properties; Long period stacking ordered (LPSO) structure; STACKING ORDERED STRUCTURE; AGE-HARDENING RESPONSE; Y-ZR ALLOYS; MECHANICAL-PROPERTIES; MICROSTRUCTURE;

D O I：

10.1016/j.msea.2014.05.042

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The high quality Mg-xYmm (x=6, 9, 12)-4Zn (Ymm=Y-rich misch metal, wt%) alloy ingots with diameter of 90-95 mm and length of 600 mm were successfully fabricated by water-cooled mold casting, and the microstructure and tensile properties have been investigated. The results demonstrated that the alloys contained four secondary phases: a plenty of 18R LPSO and 14H LPSO phases and a few of Mg3Zn3RE2 and Mg24Y5-type compounds. The ultimate tensile strength of Mg-12Ymm-4Zn alloy could keep above 130 MPa until 400 degrees C. The excellent high-temperature strength was mainly attributed to dense LPSO lamellae strengthening Mg matrix and network-like LPSO phase reinforcing grain boundaries. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：139 / 144

页数：6

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