山东科学2012，Vol.25Issue(3)：92-94,112,4.
AZ31镁合金氩弧焊接接头组织与力学性能研究
Microstructure and mechanical properties of welded joint of AZ31 magnesium alloy by DC-TIG welding
摘要
Abstract
Argon tungsten-arc welding （TIG） is the most popular welding method for magnesium alloys. AZ31 extruded plates with thickness of 6.0 mm were welded by DC-TIG welding. Microstructure and mechanical properties of welded joint of AZ31 magnesium alloy were studied by optical microscopy, scanning electron microscopy and tensile test machine. The microstructure analysis shows that the welded joint is composed of base material, heat affected zone and weld zone. A transition zone appears near the groove between the heat affected zone and the weld zone, whicb is the mix-fusion zone. The average tensile strength and the elongation of the welding joint is 24]. 0 MPa and 13.8% respectively, which arrives to 86.0% and 13.8% respectively of the base material. The fracture of welding joints is located in heat affected zone and the fracture surface presents mix fracture characteristics.关键词
镁合金/氩弧焊接/组织/力学性能Key words
magnesium alloys argon tungsten-arc welding microstructure mechanical properties分类
矿业与冶金引用本文复制引用
张新恩,周吉学,詹成伟,赵东清,李卫红,唐守秋,杨院生..AZ31镁合金氩弧焊接接头组织与力学性能研究[J].山东科学,2012,25(3):92-94,112,4.基金项目
山东省自然科学基金 （）
国家科技支撑计划 （）
