Mechanical properties of thixomolded AZ91D magnesium alloy

被引：22
作者：
Zhang, Y. F. [1 ,2 ]
Liu, Y. B. [1 ,2 ]
Cao, Z. Y. [1 ,2 ]
Zhang, Q. Q. [1 ,2 ]
Zhang, L. [1 ,2 ]
机构：
[1] Jilin Univ, Key Lab Automobile Mat, Minist Educ, Changchun 130022, Peoples R China
[2] Jilin Univ, Dept Mat Sci & Engn, Changchun 130022, Peoples R China
来源：
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2009年 / 209卷 / 03期
关键词：
Semisolid; Magnesium; Mechanical properties; Processing parameters; MICROSTRUCTURAL EVOLUTION; BEHAVIOR;
D O I：
10.1016/j.jmatprotec.2008.03.059
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Tensile properties of thixomolded AZ91D alloy were studied to investigate the fracture mechanism by the microstructure and decohesion surfaces of tensile specimens which were manufactured at different processing conditions including barrel temperature, shot velocity, mold temperature and screw rotation speed. The results revealed that mechanical properties of thixomolded AZ91D mainly depended on porosity level, the size and volume fraction of primary solid phase and the size of alpha-Mg and beta-Mg17Al12 in liquid phase. The increase in barrel temperature and shot velocity would cause the increase of both strength and ductility, while increasing mold temperature or improving screw rotation speed was coupled by the reduction of tensile properties. The tensile behaviors for different processing parameters were reasonably interpreted through the dependant factors during the deformation. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：1375 / 1384
页数：10
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