经超声冲击处理后的6005A铝合金焊接接头的焊缝区、热影响区的残余应力与未经超声冲击处理的试样各区相比均有所下降,由拉应力转变为压应力,且各区残余应力变化起伏更小。在盐雾环境中腐蚀不同时间后,未经超声冲击的焊接接头试样的残余应力基本保持为拉应力状态,而经超声冲击处理后的试样基本保持压应力状态。结果表明,超声冲击可以有效改善6005A焊接接头的抗应力腐蚀性能。 After ultrasonic impact treatment of 6005A aluminum alloy welded joints in the weld zone, the residual stress in the heat affected zone and the sample without ultrasonic impact treatment decreased compared with the various regions, from tensile stress into compressive stress, and the residual Less fluctuation in stress. After being eroded for a long time in the salt spray environment, the residual stress of the welded joint without ultrasonic impact basically kept in the state of tensile stress, while the sample after the ultrasonic impact treatment basically kept in the state of compressive stress. The results show that ultrasonic impact can effectively improve the stress corrosion resistance of 6005A welded joints.