Study on Effectiveness of Releasing Weld Residual Stress by Ultrasonic Impact Method
This paper presents the test of ultrasonic impact for reducing the welding residual stress. Three full-scale specimens according to the anchor connection plate of main girder with cable of the Jiangjin Yangtze River Bridge are made and the ultrasonic impact test are taken in laboratory to study the effectiveness of reducing welding residual stress. The comparison of welding residual stress before ultrasonic impact with the stress after ultrasonic impact is conducted and the results from test show that the welding residual stress can significantly be reduced over 50% by ultrasonic impact method and even some stress in weld could be changed form tensile stress into compressive stress after ultrasonic impact.
Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang
Q. L. Zhang et al., "Study on Effectiveness of Releasing Weld Residual Stress by Ultrasonic Impact Method", Advanced Materials Research, Vols. 189-193, pp. 3625-3628, 2011