Lightweight potential of welded high-strength steel joints from S700 under constant and variable amplitude loading by high-frequency mechanical impact (HFMI) treatment

Halid Can Yildirim, Gary Marquis, Cetin Morris Sonsino*

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    8 Citations (Scopus)
    181 Downloads (Pure)

    Abstract

    Investigations with longitudinal stiffeners of the steel grade S700 under fully-reversed, constant amplitude loading and under variable amplitude loading with a straight-line spectrum show impressive fatigue strength improvement by high-frequency mechanical impact (HFMI) treatment. However, the degree of improvement was for variable amplitude loading lower when compared to constant amplitude loading due to local plasticity which occurs during larger load levels and consequently reduces the beneficial compressive residual stresses. Apart from the HFMI-treatment, the exceedance of constant amplitude loading (Woehler-lines) by variable amplitude loading (Gassner-lines) offers further lightweight potential, despite the lower degree of improvement by HFMI under spectrum loading.

    Original languageEnglish
    Title of host publication3rd International Conference on Material and Component Performance under Variable Amplitude Loading, VAL2015
    PublisherElsevier
    Pages467-475
    Number of pages9
    DOIs
    Publication statusPublished - 2015
    MoE publication typeA4 Article in a conference publication
    EventInternational Conference on Material and Component Performance under Variable Amplitude Loading - Prague Congress Centre, Prague, Czech Republic
    Duration: 23 Mar 201526 Mar 2015
    Conference number: 3
    http://www.val-conf.org/

    Publication series

    NameProcedia Engineering
    PublisherElsevier
    Volume101
    ISSN (Print)1877-7058

    Conference

    ConferenceInternational Conference on Material and Component Performance under Variable Amplitude Loading
    Abbreviated titleVAL
    CountryCzech Republic
    CityPrague
    Period23/03/201526/03/2015
    Internet address

    Keywords

    • Constant and variable amplitude loading
    • High-frequency mechanical impact treatment
    • High-strength steel
    • Lightweight design
    • Longitudinal stiffeners

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