摘要
超声辅助搅拌摩擦焊接(UaFSW)是一种搅拌摩擦焊接改型新工艺,通过在搅拌摩擦焊接过程中施加超声外场,达到改善常规搅拌摩擦焊接工艺不足的目的。根据近年来UaFSW领域的研究进展,对铝合金UaFSW焊接工艺及机理的研究进行了全面综述,总结了超声能量的施加方式、超声的作用效果及其作用机理。相比于常规搅拌摩擦焊接,UaFSW能够降低焊接载荷、改善焊缝成形、抑制焊接缺陷、提升焊接效率、提高焊接质量和接头力学性能。UaFSW过程的多物理场耦合数值模拟表明,超声的热效应、声致塑性效应和减摩效应共同影响着焊接热过程和塑性材料流动,从而起到了上述有益效果。针对目前UaFSW研究中存在的问题进行了总结,展望未来的发展趋势,提出了下一步应重点关注的问题。
Ultrasonic assisted friction stir welding(UaFSW)is a novel variation of conventional friction stir welding(FSW),which utilizing the external ultrasonic vibration energy to improve the inherent disadvantages of conventional friction stir welding.This article reviews the progress status on ultrasonic assisted friction stir welding of aluminum alloy,including the methods to superimposing ultrasonic vibration energy in FSW,the effects of superimposing ultrasonic vibration energy on the microstructural evolution and mechanical properties of the joints,and the mechanism of superimposing ultrasonic energy in FSW.It shows that UaFSW can reduce the welding loads,improve the joint formation,suppress the weld defects,increase the welding speed,and enhance the joint properties.Multi-physical numerical simulation of UaFSW process shows that all the thermal effect,acoustoplastic effect and friction reduction effect lead to a several difference in thermal processes and plastic material flow comparing with conventional FSW,which resulting in an improved joint formation and mechanical properties as state above.Finally,the challenges and future research topics are emphasized systematically.
作者
石磊
肖亦辰
武传松
宿浩
刘小超
高嵩
SHI Lei;XIAO Yichen;WU Chuansong;SU Hao;LIU Xiaochao;GAO Song(Shandong University,Jinan 250061,China;Southeast University,Nanjing 211189,China;Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China)
出处
《航空制造技术》
CSCD
北大核心
2022年第8期36-46,共11页
Aeronautical Manufacturing Technology
基金
国家自然科学基金(51905309,52035005)。
关键词
铝合金
搅拌摩擦焊接(FSW)
声致塑性效应
微观组织
力学性能
数值模拟
Aluminum alloy
Friction stir welding(FSW)
Acoustoplastic effect
Microstructure
Mechanical property
Numerical simulation
