Characterisation of crack growth behaviour for W-added 12%Cr ferritic heat resistant steel under the creep-fatigue interaction conditions

T. Fukuda, R. Sugiura, Toshimitsu Yokobori, T. Matsuzaki

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    The W-added 12%Cr ferritic heat resistant steel has been developed as a turbine rotor material which is used under high temperature creep-fatigue conditions. In this study, crack growth tests using C(T) specimen under the creep-fatigue interaction conditions were conducted under various conditions of stress holding time, applied stress and temperatures. As a result, the effect of load frequency on crack growth behaviour and its life for this steel was characterised by the three-dimensional curved surface based on the concept of non-equilibrium science. Furthermore, a predictive law of crack growth life under the creep-fatigue interaction conditions was derived based on the concept of Q∗with the transition function of crack growth life from fatigue to creep.

    Original languageEnglish
    Pages (from-to)280-288
    Number of pages9
    JournalMaterials at High Temperatures
    Volume32
    Issue number3
    DOIs
    Publication statusPublished - 2015 May 1

    Keywords

    • Crack growth behaviour
    • Crack growth life
    • Creep-fatigue
    • Non-equilibrium science
    • W-added 12%Cr steel

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry

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