Effect of heat treatment on microstructures and mechanical properties of sand-cast Mg-4Y-2Nd-1Gd-0.4Zr magnesium alloy

被引：27
|
作者：
Liu Zhi-jie [1 ]
Wu Guo-hua [1 ]
Liu Wen-cai [1 ]
Pang Song [1 ]
Ding Wen-jiang [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Key State Lab Met Matrix Composite, Shanghai 200240, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2012年 / 22卷 / 07期
关键词：
Mg-4Y-2Nd-1Gd-0.4Zr alloy; sand-casting; heat treatment; mechanical property; WT.PERCENT ALLOY; FATIGUE BEHAVIOR; PRECIPITATION; 250-DEGREES-C;
D O I：
10.1016/S1003-6326(11)61353-8
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Influence of heat treatment on the microstructures and mechanical properties of sand-cast Mg-4Y-2Nd-1Gd-0.4Zr magnesium alloy was investigated, and the tensile fracture mechanisms of the studied alloys under different conditions were also discussed. The results show that the optimum T4 and T6 heat treatment conditions for the as-cast Mg-4Y-2Nd-1Gd-0.4Zr alloy are 525 degrees C, 8 h and (525 degrees C, 8 h)+(225 degrees C, 16 h), respectively, with regard to the microstructure observation, DSC heating curve and mechanical properties. The hardness, yield strength, ultimate tensile strength and elongation of the Mg-4Y-2Nd-1Gd-0.4Zr alloy treated by optimum T6 heat treatment are HV91, 180 MPa, 297 MPa and 7.4%, respectively. Moreover, the Mg-4Y-2Nd-1Gd-0.4Zr alloys under different heat treatment conditions exhibit different tensile fracture modes.
引用
收藏
页码：1540 / 1548
页数：9
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