Autofrettage of weld clad components

G. Benghalia, J. Wood

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Abstract

A fatigue-resistant cladding concept confirms the presence of compressive residual stresses in a cylinder weld clad with 17-4 PH stainless steel while tensile residual stresses exist in an Inconel 625 clad layer. In this study, autofrettage of an Inconel 625 thick-walled clad cylinder is investigated with modified residual stress distributions obtained indicating that tensile residual stresses throughout the clad layer are transformed to compressive in nature, discontinuity stresses at the clad/substrate interface are almost entirely eliminated and compressive residual stresses exist to a depth of around 18mm. Strain hardening effects and the assumption of an idealized interface are discussed.
Original languageEnglish
Pages (from-to)453-465
Number of pages13
JournalProcedia Engineering
Volume130
Issue number2015
DOIs
Publication statusPublished - 22 Dec 2015
Event14th International Conference on Pressure Vessel Technology - ICPVT-14 - Shanghai International Convention Center, Shanghai, China
Duration: 23 Sep 201526 Sep 2015

Keywords

  • weld cladding
  • residual stress
  • autofrettage
  • finite element analysis

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