Specimen-size dependency and modelling of energy evolution during high-temperature low-cycle fatigue of pressure vessel steel

M. D. Callaghan, S. R. Humphries, M. Law, M. Ho, K. Yan, W. Y. Yeung

    Research output: Contribution to journalArticlepeer-review

    Abstract

    High-temperature low-cycle fatigue testing was conducted on pressure vessel steel using standard and miniature specimen sizes and the fatigue toughness required for macrocrack propagation was investigated. A definite specimen-size dependency was observed for both the threshold cumulative plastic strain energy and cycles required for macrocrack propagation, which was explained to be influenced by geometric conditions. An analytical modelling prediction was developed that accounted for specimen-size dependency and was successfully applied to predict fatigue toughness to macrocrack propagation.

    Original languageEnglish
    Pages (from-to)308-311
    Number of pages4
    JournalScripta Materialia
    Volume65
    Issue number4
    DOIs
    Publication statusPublished - 1 Aug 2011

    Keywords

    • Ferritic steels
    • High-temperature deformation
    • Low-cycle fatigue
    • Plastic strain energy

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