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Effect of Similar Metal Weld & Preemptive Weld Overlay On Residual Stress of Repair Weldment In Surge Nozzle  

Oh, Chang-Young (고려대학교 기계공학과)
Song, Tae-Kwang (고려대학교 기계공학과)
Shim, Kwang-Bo (고려대학교 기계공학과)
Kim, Ji-Soo (고려대학교 기계공학과)
Kim, Yun-Jae (고려대학교 기계공학과)
Lee, Kyung-Soo (한국전력공사 전력연구원)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.22, no.6, 2009 , pp. 557-564 More about this Journal
Abstract
Welding residual stress is occurred after welding process. Tensile residual stress is one factor of PWSCC. Repair welding usually happened during the manufacturing welding process. Repair welds cause strong tensile residual stress. In PWR, Repair weldments made by Alloy 82/182 is susceptible to PWSCC caused by tensile stress, material and environment. Therefore, mitigation of welding residual stress in weldments is important for reliable operating. PWOL is one of the methods for mitigation and verified for over twenty years. In this paper, residual stress distribution of repaired weldments and the effect of PWOL on mitigation is examined for surge nozzle.
Keywords
welding residual stress; repair weld; preemptive weld overlay; surge nozzle;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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