Autofrettage of weld clad components

G. Benghalia, J. Wood

Research output: Contribution to journalArticle

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.

Fingerprint

Residual stresses
Welds
Compressive stress
Tensile stress
Strain hardening
Stress concentration
Stainless steel
Fatigue of materials
Substrates

Keywords

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

Cite this

Benghalia, G. ; Wood, J. / Autofrettage of weld clad components. In: Procedia Engineering. 2015 ; Vol. 130, No. 2015. pp. 453-465.
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Autofrettage of weld clad components. / Benghalia, G.; Wood, J.

In: Procedia Engineering, Vol. 130, No. 2015, 22.12.2015, p. 453-465.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Autofrettage of weld clad components

AU - Benghalia, G.

AU - Wood, J.

PY - 2015/12/22

Y1 - 2015/12/22

N2 - 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.

AB - 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.

KW - weld cladding

KW - residual stress

KW - autofrettage

KW - finite element analysis

UR - http://www.icpvt-14.org/

UR - http://www.sciencedirect.com/science/journal/18777058

U2 - 10.1016/j.proeng.2015.12.239

DO - 10.1016/j.proeng.2015.12.239

M3 - Article

VL - 130

SP - 453

EP - 465

JO - Procedia Engineering

T2 - Procedia Engineering

JF - Procedia Engineering

SN - 1877-7058

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