Effects of similar metal weld on residual stress in dissimilar metal weld according to safe end length kimy0308@korea.ac.kr

Tae Kwang Song, Yun Bae Chun, Chang Young Oh, Hong Yeol Bae, Yun Jae Kim, Sang Hoon Lee, Kyoung Soo Lee, Chi Yong Park

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Nozzle in nuclear power plant is connected to pipe using safe end. Dissimilar metal weld between nozzle and safe end is followed by similar metal weld between safe end and pipe. And thus residual stress in dissimilar metal weld can be affected by similar metal weld. Similar metal weld impose bending stress on dissimilar metal weld, which is according to the length of safe end. In this study, simple nozzle model which covers various radius to thickness ratios was proposed to quantify residual stress in dissimilar metal weld based on finite element analyses. As a result, short length of safe end was proved to be more effective to mitigate residual stress in dissimilar metal weld and critical effective length of safe end is provided according to the radius to thickness ratio.

Original languageEnglish
Pages (from-to)664-672
Number of pages9
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume33
Issue number7
DOIs
Publication statusPublished - 2009

Keywords

  • Dissimilar metal weld
  • Safe end
  • Similar
  • Welding residual stress

ASJC Scopus subject areas

  • Mechanical Engineering

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