镁合金TIG焊接接头组织和力学性能分析

Analysis of mechanical properties at magnesium alloy welding joint welded by TIG

应用交流TIG焊对镁合金板材进行焊接,对焊接接头进行组织观察和力学性能测试。结果表明,焊缝区为细小的等轴晶粒,热影响区晶粒粗大,拉伸断裂多发生在晶粒粗大的热影响区。

The magnesium alloy sheets have been welded by Tungsten-arc Inert-Gas weld-ing. The microstructure and mechanical properties of the welded joint have been investiga-ted. The results show that fine isometric grains have been found at the welding zone and the grains became coarse at the heat affecting zone, and the tensile fracture usually happened at the heat affecting zone with coarse grains.