| Abstract Scope |
In the present study, the Mg-1.3Zn-0.5Ca (wt.%) magnesium alloy was hot extruded and subsequently annealed at 300°C, 350°C, and 400°C for different holding times to optimize microstructure and mechanical properties. The results show that the bimodal microstructure is the main feature of the as-extruded Mg-1.3Zn-0.5Ca alloy, which can be described as the elongated grains are surrounded by the fine dynamic recrystallized (DRXed) grains. Moreover, the as-extruded alloy shows a strong {10-10} fiber texture, especially for the large elongated grains. The annealing treatment results in static recrystallization, which increases fine equiaxed grains but decreases large elongated grains. In addition, the equiaxed grains formed during the annealing treatment weaken the {10-10} fiber texture of the alloy. Also, the annealing treatment could increase the yield and ultimate strength, but the elongation decreases, especially at a higher temperature, which can be ascribed to the evolution of microstructure and texture. |