Sensitivity analyses of finite element method for estimating residual stress of dissimilar metal multi-pass weldment in nuclear power plant

Tae Kwang Song, Hong Yeol Bae, Yun Jae Kim, Kyoung Soo Lee, Chi Yong Park

Research output: Contribution to journalArticle

22 Citations (Scopus)

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 languageEnglish
Pages (from-to)770-781
Number of pages12
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume32
Issue number9
DOIs
Publication statusPublished - 2008 Sep 1
Externally publishedYes

Fingerprint

Dissimilar metals
Nuclear power plants
Residual stresses
Finite element method
Welds
Piping systems
Stress corrosion cracking
Austenitic stainless steel
High strength steel
Sensitivity analysis
Crack propagation
Nozzles
Welding
Water

Keywords

  • Dissimilar metal weld
  • PWSCC
  • Residual stress
  • Sensitivity analysis

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Sensitivity analyses of finite element method for estimating residual stress of dissimilar metal multi-pass weldment in nuclear power plant. / Song, Tae Kwang; Bae, Hong Yeol; Kim, Yun Jae; Lee, Kyoung Soo; Park, Chi Yong.

In: Transactions of the Korean Society of Mechanical Engineers, A, Vol. 32, No. 9, 01.09.2008, p. 770-781.

Research output: Contribution to journalArticle

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