Microstructures and mechanical properties of high performance Mg-4Y-2.4Nd-0.2Zn-0.4Zr alloy

被引：60
|
作者：
Su, Zaijun [1 ]
Liu, Chuming [1 ]
Wan, Yingchun [1 ]
机构：
[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
来源：
MATERIALS & DESIGN | 2013年 / 45卷
关键词：
Y-ND ALLOY; MAGNESIUM ALLOYS; AGING PRECIPITATION; WT.PERCENT ALLOY; MG; ZN; 250-DEGREES-C; EVOLUTION; PHASES;
D O I：
10.1016/j.matdes.2012.07.023
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructures and mechanical properties of the high performance Mg-4Y-2.4Nd-0.2Zn-0.4Zr alloy were investigated. The results showed that the alloy was mainly composed of alpha-Mg, Mg24Y5 and Mg12Nd phases in the as-cast condition. After the solution treatment at 500 degrees C for 6 h and subsequent ageing at different temperatures, alloy exhibited the remarkable mechanical properties. The values of ultimate tensile strength, yield strength and elongation were 339 MPa, 268 MPa and 4.0% in 200 degrees C peak-aged condition, and 330 MPa, 265 MPa and 6.5% in 225 degrees C peak-aged condition, respectively. The high mechanical properties were mainly attributed to a high volume fraction of fine metastable precipitates in the matrix. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：466 / 472
页数：7
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