In this paper,the microstructures,phase constituent and micro zone analysis of AZ31B wrought Mg alloy welded joint were investigated by optical microscope,XRD and EPMA.

• 采用光学显微镜、X射线衍射仪 (XRD)和电子探针 (EPMA)等分析测试手段 ,对变形镁合金AZ31B的TIG焊接头进行了微观组织观察、相组成和微区成分分析试验。