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A high-strength extruded Mg–Gd–Zn–Zr alloy with superplasticity

Published online by Cambridge University Press:  31 January 2011

Y.J. Wu ,
L.M. Peng ,
X.Q. Zeng ,
D.L. Lin  and
W.J. Ding
L.M. Peng*
Affiliation:
National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China; and The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
X.Q. Zeng
Affiliation:
National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China; and The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
D.L. Lin
Affiliation:
National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China; and School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
W.J. Ding
Affiliation:
National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China; and The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
*
a) Address all correspondence to this author. e-mail: plm616@sjtu.edu.cn
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Abstract

This article presents an extruded Mg–Gd–Zn–Zr alloy produced by conventional ingot metallurgy, exhibiting high-strength and excellent ductility at room and elevated temperatures. The superplastic behavior was observed in the Mg–Gd–Zn (–Zr) alloy at elevated temperatures above 573 K. In the alloy, both the X phase in grain boundaries and the lamellae within matrix have the 14H-type long-period, stacking-ordered structure. It indicates that the X phase and the lamellae within matrix play important roles in the excellent mechanical properties.

Keywords

ExtrusionMgSuperplasticity
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 12 , December 2009 , pp. 3596 - 3602
Copyright
Copyright © Materials Research Society 2009

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