Microstructure and performance of AZ80D magnesium alloy by purification of chloride flux containing Er
来源期刊：Rare Metals2014年第5期
论文作者：Zhong-Jun Wang Guan-Qiao Su Wei-Ping Jia Qing-Xiang Yang
文章页码：541 - 546
摘 要：The purification effects of Er addition in chloride flux during smelting on microstructure, tensile properties, and corrosion resistance of as-cast AZ80 D magnesium alloy were carried out. The results show that Er addition in the flux can eliminate the MgO inclusions and improve the tensile properties and corrosion resistance of the alloy. Using chloride flux mixed with 8.0 wt% Er, rb and d of the as-cast AZ80 D magnesium alloy can be improved from 150 MPa and 2.1 % to the maximum value of 230 MPa and 4.8 %, respectively. Meanwhile, the corrosion rate decreases from 1.10 to 0.12 mgá（cm2ád）-1in5 wt% NaCl solution. However, with increasing Er content in chloride flux further, u-（Al7ErMn5） and s-（Al66.7Mg23.3Er10） phase are formed, and the morphology of c-（Mg17Al12） phase is modified. The coarse u-（Al7ErMn5）phase along dendrite boundaries decreases cohesion force between dendrites, which results in the worse of tensile properties.
Zhong-Jun Wang1,2，Guan-Qiao Su1，Wei-Ping Jia1,2，Qing-Xiang Yang3
1. School of Material and Metallurgy, University of Science and Technology Liaoning3. State Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering,Yanshan University
摘 要：The purification effects of Er addition in chloride flux during smelting on microstructure, tensile properties, and corrosion resistance of as-cast AZ80 D magnesium alloy were carried out. The results show that Er addition in the flux can eliminate the MgO inclusions and improve the tensile properties and corrosion resistance of the alloy. Using chloride flux mixed with 8.0 wt% Er, rb and d of the as-cast AZ80 D magnesium alloy can be improved from 150 MPa and 2.1 % to the maximum value of 230 MPa and 4.8 %, respectively. Meanwhile, the corrosion rate decreases from 1.10 to 0.12 mgá（cm2ád）-1in5 wt% NaCl solution. However, with increasing Er content in chloride flux further, u-（Al7ErMn5） and s-（Al66.7Mg23.3Er10） phase are formed, and the morphology of c-（Mg17Al12） phase is modified. The coarse u-（Al7ErMn5）phase along dendrite boundaries decreases cohesion force between dendrites, which results in the worse of tensile properties.
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