Effects of zinc concentration on the stretch formability at room temperature of the rolled Mg-Zn-Ca alloys

Abstract

Effects of zinc concentration on the stretch formability of the rolled Mg-Zn-Ca alloys were investigated. The zinc addition more than 0.5 mass% effectively modified the basal plane texture, which was characterized by the splitting basal pole toward the TD. The intensity of basal plane texture decreased with the increase in zinc concentration. The rolled Mg-1.5 mass%Zn-0.1 mass%Ca alloy showed significant stretch formability corresponding to the rolled aluminum alloys. On the other hand, the zinc addition more than 1.5 mass% deteriorated the stretch formability of rolled Mg-Zn-Ca alloys. The deterioration of the stretch formability of rolled Mg-Zn-Ca alloys with high zinc concentration was suggested to be responsible for the solid solution hardening. It was suggested that not only the TD-split texture but also the solid solution softening played an important role in the enhanced stretch formability of the rolled Mg-Zn-Ca alloys. © 2011 the Japan Institute of Metals.