Recent Advances and Trends in Rotating Tools Used for Friction stir Welding

Recent advances in rotating tools used for friction stir welding(FSW),is summarized regarding to the development of rotating tool materials,design and optimization of shoulders and pins,and wear resistance of rotating tools.New trends mainly focusing on the development of low cost and high performance new rotating tool materials and manufacturing technologies,improvement of design of rotating tools,are predicted.All these achievements will play an important guide on strategic plan,technical research,and technology applications of FSW industries in China.