标题：Auxiliary energy assisted friction stir welding - status review
作者：Padhy, G. K.; Wu, C. S.; Gao, S.
作者机构：[Wu, C. S.] Shandong Univ, MOE Key Lab Liquid Solid Struct Evolut & Mat Proc, Jinan 250061, Peoples R China.; Shandong Univ, Inst Mat Joining, Jinan 更多
通讯作者地址：[Wu, CS]Shandong Univ, MOE Key Lab Liquid Solid Struct Evolut & Mat Proc, Jinan 250061, Peoples R China.
来源：SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
关键词：Friction stir welding; Auxiliary energy sources; Thermal energy assisted; FSW; Mechanical energy assisted FSW; Ultrasonic vibration assisted FSW
摘要：The present article introduces the auxiliary energy assisted friction stir welding (FSW) processes purported to overcome the shortcomings of the conventional FSW process. The auxiliary energies used for this purpose are thermal energy from electric resistance heat, induction heat, laser, plasma, arc, etc. and mechanical energy in the form of ultrasonic vibration. The state-of-the-art, experimentation and progresses in these FSW variants are surveyed and compiled. The auxiliary energy assisted FSW processes exhibit great promise by having numerous advantages over the conventional FSW in terms improved process window, heat generation, material flow, reduced load on the tools and mechanical properties of joints. Such remarkable advantages would lead these processes to redefine many global technologies and markets in the twenty-first century. However, these variants are still in their preliminary stages of investigation, and more systematic investigations are necessary for their critical assessment. In this aspect, some unsolved issues and challenges are overlooked.