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《Ordnance Material Science and Engineering》 2011-01
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Microstructure and mechanical properties of severely deformed AZ31-1%Si-0.5%Sb alloy

CHENG Zhe1,GUO Xuefeng2,YANG Wenpeng1,XU Chunjie1(1.School of Materials Science and Engineering,Xi′an University of Technology,Xi′an 710048,China; 2.School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China)  
The effect of severely plastic deformation on microstructure and properties of AZ31-1%Si-0.5%Sb alloy was studied,and the refinement mechanism of α-Mg and Mg2Si particles was investigated.Extrusion can refine microstructure of the studied alloy,thus improving the mechanical properties.The extruded matrix grain size is about 2 μm.Fine and uniform grain size microstructure was achieved when the alloy underwent four passes of reciprocating extrusion.The tensile strength,yield strength,elongation and hardness after reciprocating extrusion increased by 21.8%,19.8%,43.6% and 21.5%,respectively,in comparison with the alloy with one pass of extrusion deformation.The improvement of the properties is due to the further refinement of matrix,and particles of Mg2Si and β-Mg17Al12.
【Fund】: 教育部博士点基金(20070700003);; 河南省科技攻关资助项目(102102210031);; 河南省教育厅自然科学基金资助项目(2010A430008)
【CateGory Index】: TG146.21
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