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Effect of Al and Sn Addition on Microstructure and Mechanical Properties of Mg-Zn-Ca Alloy

BAI Yao;DONG Shengquan;HE Zibo;FENG Qiangqiang;School of Materials and Chemical Engineering,Xi'an Technological University;  
Mg-Zn-Ca alloy was used as the matrix, and 1 wt%Al-(0.5, 1, 1.5)wt%Sn elements were added to study the effect of Al and Sn on the microstructure and mechanical properties of as-cast Mg-Zn-Ca alloy. The alloy was analyzed by metallographic(OM), scanning(SEM) and X-ray(XRD). It is found that the addition of Al and Sn elements refines the grains of the matrix and produces snowflake, strip and block phases. The new phase can improve the mechanical properties of as-cast Mg-Zn-Ca alloy. When 1 wt% Al + 1.5 wt% Sn is added, the tensile strength and elongation after fracture of the alloy increase from 151 MPa and 2.0% without Al, Sn addition to 188 MPa and 3.7%, respectively.
【Fund】: 榆林市镁合金研制与开发项目(0103204040002)
【CateGory Index】: TG146.22
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