Numerical investigation on welding residual stresses in a PWR pressurizer safety/relief nozzle

Tae Kwang Song, Hong Ryul Bae, Yun Jae Kim, Kyung Soo Lee

研究成果: Article査読

19 被引用数 (Scopus)

抄録

This paper presents finite element simulation results of residual stresses in dissimilar metal welds of a PWR pressurizer safety/relief nozzle. The present results are believed to be significant in two aspects. The first one is to consider the effect of the presence of similar metal welds on resulting residual stresses. The second one is the mitigation effect of the overlay welding thickness on residual stresses. After dissimilar metal welding, tensile residual stresses are present both at the inner surface and at the outer surface of dissimilar metal welds. Adjacent similar metal welding, however, decreases residual stresses to compressive ones at the inner surface of dissimilar metal welds, possibly due to the bending mechanism caused radial contraction of the weld. At the outer surface of dissimilar metal welds, similar metal welding increases residual stresses. Overlay welding further decreases residual stresses at the inner surface of dissimilar and similar metal welds, but increases slightly residual stresses at the outer surface.

本文言語English
ページ(範囲)689-702
ページ数14
ジャーナルFatigue and Fracture of Engineering Materials and Structures
33
11
DOI
出版ステータスPublished - 2010 11 1
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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