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《Rare Metal Materials and Engineering》 2008-10
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As-Cast Microstructure and Mechanical Properties of Sr and Sb Modified AZ61-0.7Si Magnesium Alloy

Yang Mingbo 1,2, Pan Fusheng 2, Cheng Renju2, Zhao Weilin1 (1. Chongqing Institute of Technology, Chongqing 400050, China) (2. Chongqing University, Chongqing 400030, China)  
The modification and refinement of Mg2Si phase is thought as one of the key aspects to improve the mechanical properties of Si-containing magnesium alloys. The paper investigates the as-cast microstructure and mechanical properties of Sr and Sb modified AZ61-0.7Si magnesium alloy. The results indicate that adding 0.4wt%Sb can result in the relative refinement of Chinese-script-shaped Mg2Si phases in the AZ61-0.7Si alloy, but the modification is not obvious. However, adding small amounts of Sr can obviously modify and refine the Chinese-script-shaped Mg2Si phases in the alloy. After added 0.03wt%~0.09wt% Sr, the morphology of the Mg2Si phases in the alloy changes from the coarse Chinese script shape to fine granule and/or irregular polygonal shapes. Accordingly, the tensile and creep properties of the alloy are greatly improved.
【Fund】: 国家杰出青年基金资助项目(50725413);; 重庆市科技攻关项目(2006AA4012-9-6)
【CateGory Index】: TG27
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【Co-citations】
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1 CHENG Renju1),PAN Fusheng1),YANG Mingbo2),TANG Aitao1)1)Materials Science & Engineering College,Chongqing University,Chongqing 400030,China2)Materials Science & Engineering College,Chongqing Institute of Technology,Chongqing 400050,China;Effect of Sr on the grain refinement of ZK60 magnesium alloy[J];Journal of University of Science and Technology Beijing;2008-12
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