| Title |
A Method of Residual Stress Improvement by Plastic Deformation in the Pipe Welding Zone |
| Authors |
최상훈(Sang-Hoon Choi) ; 왕지남(Ji-Nam Wang) |
| DOI |
http://dx.doi.org/10.6110/KJACR.2013.25.10.568 |
| Keywords |
잔류응력 ; 이종금속 용접 ; 응력부식 균열소성변형 Residual Stress ; Dissimilar Metal Weld ; Stress Corrosion Cracking ; Plastic Deformation |
| 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. |