Research progress on fatigue performance of aluminum alloy friction stir welded joints
Aluminum alloy is widely used in aerospace,transportation and other fields because of its excellent performance,but its connection process still restricts the use of aluminum alloy.Solid phase welding-friction stir welding solves the problem of weight gain in aluminum alloy riveting and the problem of welding defects in fusion welding connection,and solves the connection problem of aluminum alloy to a certain extent.As with other welding processes,the friction stir welding joint of aluminum alloy is a weak link in the weldment,affecting the safety and life of the weldment.Therefore,the fatigue performance of aluminum alloy friction stir welding joint is the key factor to determine the durability and safety of the component.Therefore,it is very important to systematically and deeply grasp the fatigue performance of aluminum alloy friction stir welding joints.This paper introduces the microstructure and fatigue fracture characteristics of aluminum alloy friction stir welding joints in detail,analyzes the effects of process parameters,microstructure,applied load,corrosion environment and other factors on the fatigue performance of aluminum alloy friction stir welding joints,and summarizes the surface strengthening technology,external auxiliary technology,heat treatment and other methods to improve the fatigue performance of aluminum alloy friction stir welding joints.Finally,the research on fatigue performance of aluminum alloy friction stir welding joints is prospected.
万方数据
维普
