| 2005 №10 (02) | 2005 №10 (00) |
The Paton Welding Journal, 2005, #10, 14-20 pages
Determination of residual stresses in the WWER vessels after multi-run welding, surfacing and high-temperature tempering
B.Z. Margolin, A.Ya. Varovin, V.I. Kostylyov
E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
Calculations of residual stresses formed after welding, surfacing and tempering have been made for bodies of the water-moderated (WWER) type reactors. The calculation procedure is based on solutions of temperature and non-isothermal elastoplastic problems obtained using the finite elements method. α-Fe → γ-Fe transformations and creep have been allowed for in solving the deformation problem. The investigations conducted show that the α-Fe → γ-Fe transformation does have an effect on the distribution of residual stresses depending upon the conditions, under which this effect can be substantial, and under which it can be ignored.
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