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HE Wenxiong, XIAO Changhui, SHI Fei, ZHAO Hongyun, LI Sihao, YI Chuanpei. Reduction of welding residual stress by in-situ ultrasonic impact treatment[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(8): 84-87.
Citation: HE Wenxiong, XIAO Changhui, SHI Fei, ZHAO Hongyun, LI Sihao, YI Chuanpei. Reduction of welding residual stress by in-situ ultrasonic impact treatment[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(8): 84-87.
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Reduction of welding residual stress by in-situ ultrasonic impact treatment

  • 1.

    Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China

  • 2.

    The 725 Institute of China Ship Building Industry Corporation, Luoyang 471000, China

  • 3.

    Hunan Mechanical & Electrical Polytechnic, Changsha 410151, China

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  • Received Date: January 02, 2014
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    • Abstract
  • In order to reduce welding residual stress, ultrasonic impact was applied on the back of the weld bead during welding process. The results show that, the in-situ treatment of ultrasonic impact can reduce residual stress effectively, the reduction effect of longitudinal residual stress is more obvious than that of transverse residual stress. When the ultrasonic impact is applied in the elastic-plastic transition temperature zone of the weld, the impact head diameter is relatively small and the impact head shape is spherical shape, the effect of reducing welding residual stress is better. The mechanism of in-situ ultrasonic impact is that, when the impact is applied on the back of the weld bead, tensile plastic deformation is produced at the face side of the weld bead. It counteracts more compressive plastic deformation that was generated during the heating expansion stage and finally leads to the reduction of the residual stress.
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    • References (11)
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