Microstructures and mechanical properties of extruded tubes of AZ91+XCa (X=0, 0.5, 1, 1.5 wt. %) alloys were investigated using OM, SEM, XRD and mechanical property test.

• 利用OM；SEM；XRD及力学性能测试等手段；研究了添加Ca元素的AZ91+XCa(X=0；0.；5；1