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Influence of cryogenic treatment on room and low temperature tensile behavior of as-cast Mg–10Gd–3Y–0.5Zr magnesium alloy

Published online by Cambridge University Press:  26 February 2016

Xiangjun Chen ,
Wencai Liu ,
Guohua Wu ,
H.R. Jafari Nodooshan ,
Xuefeng Zhang ,
Song Zhang ,
Kehua Zhou  and
Wenjiang Ding
Xiangjun Chen
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Wencai Liu*
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; and Shanghai Light Alloy Net Forming National Engineering Research Center Co., Ltd., Shanghai 201615, China
Guohua Wu
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
H.R. Jafari Nodooshan
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Xuefeng Zhang
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Song Zhang
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Kehua Zhou
Affiliation:
Science and Technology on Space Physics Laboratory, Beijing 100076, China
Wenjiang Ding
Affiliation:
National Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
*
a) Address all correspondence to this author. e-mail: liuwc@sjtu.edu.cn
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Abstract

In this study, the temperature gradient on lunar surface was simulated by deep cryogenic treatment and cryogenic thermocycling. The influence of these treatments on room and low temperature tensile properties and fracture behavior of the as-cast Mg–10Gd–3Y–0.5Zr alloy was then investigated. The results have shown that the cryogenic treatments caused the precipitation of Mg24(Gd, Y)5 phase and improved the ductility of the alloy. The deep cryogenic treatment almost has no influence on the tensile properties of the alloy, while the cryogenic thermocycling slightly improve its tensile properties at room temperature and slightly deteriorate the ultimate tensile strength of the alloy at low temperature. The cleavage fracture is the main fracture mechanism at both room and low temperatures. To conclude, this alloy can withstand the huge temperature gradient on the lunar surface and shows application perspective.

Keywords

Mgcastingmicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 4 , 29 February 2016 , pp. 419 - 426
Copyright
Copyright © Materials Research Society 2016 

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