ABSTRACT
Mg is one of the lightest metals and applications for its alloys have grown continuously. The low formability of wrought Mg alloys, due to their hexagonal crystal structure, has been a nontrivial issue impeding its wider use in industry. A variety of research has been conducted to enhance the mechanical properties of such alloys, both by careful alloy design and by thermo-mechanical processing, and thus to develop wrought Mg alloys with high strength and formability. The addition of Zn to Mg alloys contributes to their strength by solid solution hardening and precipitate hardening. Additional doping of small amounts of Zr in Mg alloys also improves mechanical properties by grain refinement. In this section, the effect of Zn on rollability and mechanical properties of Mg alloys was investigated. Rollability and mechanical properties were improved with Zn content. The effect of aging heat treatment on microstructure, texture and mechanical properties was also examined. After the aging, many precipitates were found to be formed, and affected mechanical behaviors.
