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《Journal of Chongqing University(Natural Science Edition)》 2006-10
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As-cast Microstructure and the Mechanical Properties About Mg-(6~8)Al-1Zn-0.7Si Alloys

BAI Liang~1,PAN Fu-sheng~1,YANG Ming-bo~(1,2)(1.College of Material Science and Engineering,Chongqing University,Chongqing 400030,China;2.Department of Material Science,Chongqing Institute of Technology,Chongqing 400050)  
In the paper the as-cast microstructure and the mechanical properties about Mg-(6~8)Al-0.7Si alloys were studied by metallurgical phase analysis,SEM analysis,XRD analysis and tensile test.The experimental results showed that the as-cast microstructure of Mg-(6~8)%A1-0.7%Si alloys containing small amount Sb and RE are mainly composed of α-Mg matrix,Mg_(17)Al_(12) phase,Mg_2Si phase,Mg_3Sb_2 phase and a few needle shaped Al4Si2Mn2Y quaternion phase,and With the Al content increasing,the amount of Mg_(17)Al_(12) phase increased,th eutectic structure is more continuously.According to the experimental results of mechanical properities,It is found that the influenceing law of Al content on the UTS,YS and elongation is different.
【Fund】: 重庆市科技攻关项目(CSTC 2004AA4003)
【CateGory Index】: TG113.12
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