Measuring and modelling residual stresses in butt welded P91 steel pipe including effects of phase transformations

A. H. Yaghi, T. H. Hyde, A. A. Becker, W. Sun, G. Hilson, S. Simandjuntak, P. E.J. Flewitt, M. J. Pavier, D. J. Smith

Research output: Contribution to journalArticlepeer-review

Abstract

Residual stresses in a circumferentially butt welded steel pipe have been measured and numerically predicted. The pipe, containing the circumferential weld, has an outer diameter of 290 mm and a wall thickness of 55 mm, typical of components in power generation plants. An axisymmetric thermomechanical finite element (FE) simulation has been performed to obtain the residual stress field induced by the fusion welding of the pipe, taking solid state phase transformation effects into account and using temperature dependent material property data. Residual stresses have been measured using the X-ray diffraction and deep hole drilling techniques. Good correlation has been demonstrated with the predictions of the FE model. The paper demonstrates that a mixed experimental and numerical approach is useful for determining the residual stress distribution in welded joints.

Original languageEnglish
Pages (from-to)124-132
Number of pages9
JournalEnergy Materials: Materials Science and Engineering for Energy Systems
Volume4
Issue number3
DOIs
Publication statusPublished - 1 Sep 2009

Keywords

  • Martensite
  • P91 steel welding
  • Residual stress

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