Fatigue performance of friction stir welded marine grade steel

H. Polezhayeva, A.I. Toumpis, A.M. Galloway, L. Molter, Bilal Ahmed, Michael E. Fitzpatrick

    Research output: Contribution to journalArticle

    8 Citations (Scopus)
    88 Downloads (Pure)

    Abstract

    An extensive study on the fatigue performance of friction stir welded DH36 steel was carried out. The main focus of this experimental testing programme was fatigue testing accompanied by tensile tests, geometry measurements, hardness and residual stress measurements, and fracture surface examination. The S–N curve for friction stir butt welded joints was generated and compared with the International Institute of Welding recommendations for conventional fusion butt welds. Friction stir welds of marine grade steel exceeded the relevant rules for fusion welding. This newly developed S–N curve is being proposed for use in the relevant fatigue assessment guidelines for friction stir welding of low alloy steel. Fracture surfaces were examined to investigate the fatigue failure mechanism, which was found to be affected by the processing features generated by the friction stir welding tool.
    Original languageEnglish
    Pages (from-to)162–170
    JournalInternational Journal of Fatigue
    Volume81
    DOIs
    Publication statusPublished - 13 Aug 2015

    Bibliographical note

    NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Fatigue. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Fatigue, 81, (2015)] DOI: 10.1016/j.ijfatigue.2015.08.003.

    © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

    Keywords

    • Friction stir welding
    • Low alloy steel
    • Fatigue testing
    • Residual stresses
    • Fracture surface analysis

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