Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 527, Issue 26, Pages 7002-7007Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2010.07.019
Keywords
Mg-Zn-Al alloy; Sn; Microstructure; Mechanical properties; Heat resistance
Categories
Funding
- Science and Technology Supporting Project of Changchun City [2007KZ05]
- National Science and Technology Supporting Program of China [2006BA104804-1]
- Chinese Academy of Science
- China Scholarship Council
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The microstructures and tensile properties of the as-cast and heat treated Mg-7Zn-5Al based alloys with 1-6 wt.% Sn addition were studied. The results show that all the Sn-containing alloys consist of alpha-Mg, tau-Mg-32(Al, Zn)(49), beta-Mg17Al12 and Mg2Sn phases. The addition of Sn refines the tau-Mg-32(Al, Zn)(49) phase and suppresses the formation of network-shaped phase. Tensile tests indicate that the Sn-containing alloys exhibit excellent heat resistance, and the yield strength increases with increasing the Sn content. The ageing treatment can obviously improve the tensile strength of the studied alloy, while the aged Mg-7Zn-5Al-2Sn alloy has optimal mechanical properties. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
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