期刊
MATERIALS CHARACTERIZATION
卷 59, 期 11, 页码 1667-1674出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2008.03.007
关键词
Mg-Zn-Gd alloys; Solution treatment; Microstructure; Mechanical properties
类别
资金
- Chinese Academy of Science for Distinguished Talents Program
- The Science Program of the Promotes Northeast of CAS [KGCX2-SW-216]
- Science and Technology Program of Changchun [05GG54]
Microstructure and mechanical properties of peak-aged Mg-4.5Zn-xGd (x=0, 0.5, 1.0 and 1.5 wt.%) alloys have been investigated. The results showed that the grain size of the alloys was refined gradually with increasing Gd. Mg(5)Gd and Mg(3)Gd(2)Zn(3) phases were found in the Gd-containing alloys. The strengths were greatly improved with Gd additions, and the highest strength level was obtained in the Mg-4.5Zn-1.5Gd alloy, in which the ultimate tensile strength and yield strength were 231 MPa and 113 MPa, respectively. Through comparing with the Mg-4.5Zn alloy, the increments of ultimate tensile strength and yield strength were 22 MPa and 56 MPa, respectively. The improved strength was mainly correlated to the grain refining effect, the strengthening effect of the Mg(5)Gd and Mg(3)Gd(2)Zn(3) phases and also the hardening effect of the solutioned Gd atoms. (C) 2008 Elsevier Inc. All rights reserved.
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