Abstract
In nuclear power plants, ferritic low alloy steel components were connected with austenitic stainless steel piping system through alloy 82/ 182 butt weld. There have been incidents recently where cracking has been observed in the dissimilar metal weld. Alloy 82/182 is susceptible to primary water stress corrosion cracking. Weld-induced residual stress is main factor for crack growth. Therefore exact estimation of residual stress is important for reliable operating. This paper presents residual stress computation performed by 6" safety & relief nozzle. Based on 2 dimensional and 3 dimensional finite element analyses, effect of welding variables on residual stress variation is estimated for sensitivity analysis.
| Original language | English |
|---|---|
| Pages (from-to) | 770-781 |
| Number of pages | 12 |
| Journal | Transactions of the Korean Society of Mechanical Engineers, A |
| Volume | 32 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2008 Sept |
| Externally published | Yes |
Keywords
- Dissimilar metal weld
- PWSCC
- Residual stress
- Sensitivity analysis
ASJC Scopus subject areas
- Mechanical Engineering