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http://dx.doi.org/10.6110/KJACR.2013.25.10.568

A Method of Residual Stress Improvement by Plastic Deformation in the Pipe Welding Zone  

Choi, Sang-Hoon (Technical Research & Development Institute, KPS)
Wang, Ji-Nam (Department of Industrial Engineering, Ajou University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.25, no.10, 2013 , pp. 568-572 More about this Journal
Abstract
The main components, such as a reactor vessel, in commercial nuclear power plants have been welded to pipes with dissimilar metal in which Primary Water Corrosion Cracking (PWSCC) has been occurred. PWSCC has become a worldwide issue recently. This paper addresses the results of experimental and numerical analysis to prevent PWSCC by changing the stress profile that is tensile stress to compressive stress at interesting regions with plastic deformation generated by mechanical pressure. Based on the results of experimental and numerical analysis with a 6 inch pipe and dissimilar metal welded pipes, compressive stress 68~206 Mpa is generated at all locations of inner surface in the heat affected zone.
Keywords
Residual Stress; Dissimilar Metal Weld; Stress Corrosion Cracking; Plastic Deformation;
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  • Reference
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