期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2009.10.031
关键词
Magnesium alloys; Age hardening; Tensile strength; Mg-Y-Gd-Zn-Zr
类别
资金
- Hi-Tech Research and Development Program of China [2006AA03Z520]
- Chinese Academy of Sciences
- Jilin Province
- Baikov Institute of Metallurgy and Materials Science
- Russian Academy of Sciences, Moscow
Microstructures and mechanical properties of Mg-7Y-4Gd-1.5Zn-0.4Zr alloy in the as-cast, as-extruded and peak-aged conditions have been investigated by using optical microscope, scanning electron microscope, X-ray diffraction and transmission electron microscope. The results show that optimal mechanical properties of this alloy are obtained when it was aged at 220 degrees C. The values of the ultimate tensile strength and yield tensile strength are 418 and 320 MPa, respectively. The age hardening response decreases with increasing ageing temperature because the beta' phase gets coarse as ageing temperature increases. (C) 2009 Elsevier B.V. All rights reserved.
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