关键词: 搅拌摩擦焊, 固有模式, 异种材料, 高质量焊接

Abstract: Friction stir welding (FSW) involves temperature, mechanics, metallurgy, and their interactions, which has become a revolutionary green welding technique over the past two decades because of the low peak temperature, severe plastic deformation, and high⁃quality joint. In order to further broaden its application in manufacturing fields, it was necessary to break through the technical barriers of inherent issues. Based on the inherent issues of weld thinning, keyhole and defects quasi⁃equal strength repairing, back⁃supporting and high⁃quality welding of dissimilar materials (such as dissimilar metals and metals/polymers), this paper reviewed the development of FSW innovative technology, which had practical significance for improving joint forming, realizing high⁃reliability joining and expanding engineering application.

Key words: Friction stir welding, Inherent issues, Dissimilar materials, High?quality welding