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《Journal of University of Science and Technology Beijing》 2008-12
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Effect of Sr on the grain refinement of ZK60 magnesium alloy

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  
The effect of Sr addition on the grain refinement of ZK60 magnesium alloy was investigated by means of OM,SEM and EDX.The results indicate that adding small amounts of Sr can effectively refine the as-cast microstructure of ZK60 alloy,but the effects of Sr adding amount and melt holding time on the refinement efficiency are obvious.For a given melt holding time,the refinement efficiency enhances with the Sr adding amount increasing from 0.01% to 0.1%.For a given Sr adding amount,the refinement efficiency enhances with the melt holding time increasing from 20 to 80 min,but reduces obviously while the melt holding time exceeds 80 min.
【Fund】: 国家杰出青年基金资助项目(No.50725413);; 国家重点基础研究发展规划资助项目(No.2007CB613704)
【CateGory Index】: TG146.22
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