所属单位：材料科学工程学院
发表刊物：Welding China
项目来源：省、市、自治区科技项目
关键字：friction stir welding, microstructure, mechanical properties, corrosion resistance, electrical resistivity
摘要：Copper plates with 3 mm thickness were friction stir welded at a rotation rate of 800 rpm and different welding velocity. The effects of microstructure and the mechanical/Conductivity properties of the FSW joints were studied. The results indicate that the grain sizes of nugget zones are 2.49, 2.13 and 5.07 μm for welding speed of 100, 150 and 200 mm/min, respectively. Furthermore, lower density of dislocation was obtained in the nugget zone. Under the welding speed of 200 mm/min, annealing twins had been observed. When the speed is 150 mm/min, the tensile strength of the stir welded joint is 264 MPa that can reach 98% of the base material. The mechanical properties of the joints with the welding speed of both 100 and 200 mm/min are lower than the base metal. The corrosion resistance of weld is higher than that of base material. Electrical resistivity measurement shows no obvious change in the welded joints compared to the base metal at the room temperature.
第一作者：刘威
论文类型：期刊论文
页面范围：3
是否译文：否
发表时间：2020-09-10