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Fatigue crack growth in multi-pass butt-welded joints of mild steel

Authors
Journal
International Journal of Pressure Vessels and Piping
0308-0161
Publisher
Elsevier
Publication Date
Volume
42
Issue
3
Identifiers
DOI: 10.1016/0308-0161(90)90033-e
Disciplines
  • Mathematics
  • Physics

Abstract

Abstract Fatigue crack growth rate properties obtained by testing multi-pass butt-welded joints in the through-the-thickness direction are presented along with a characterization of the mild steel base material. Edge-notched four-point-bending specimens are used to investigate R-ratio, specimen geometry and post-weld heat-treatment effects on fatigue crack growth rates. The pervasive influence of residual stresses on welded joint fatigue testing using the fracture mechanics approach is also discussed. For these multi-pass joints, conservative fatigue crack growth rates are obtained with post-weld heat-treated specimens.

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