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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.
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% However, with increasing Er content in chloride flux further, u- (Al7ErMn5) and s- (Al66.7Mg23.3Er10) phase, the corrosion rate decreases from 1.10 to 0.12 mga are formed, and the morphology of c- (Mg17Al12) phase is modified. The coarse u- (Al7ErMn5) phase along dendrite boundaries reduces cohesion force between dendrites, which results in the worse of tensile properties.