Crack growth characteristics and damage in 12Cr steel under high temperature creep and creep-fatigue conditions

O. Yokota, R. Sugiura, M. Yoda, A. T. Yokobori, T. Yokobori

    研究成果: Article査読

    4 被引用数 (Scopus)

    抄録

    The combined effects of temperature and frequency on the crack growth rate and failure life were investigated using the compact tension specimens of 12Cr steel under creep and creep-fatigue conditions. The creep-fatigue tests were performed by introducing the hold time at the maximum load. At higher frequency where the crack growth rate near the initial stress intensity factor or reciprocal of failure life is proportional to the frequency, the cycle-dependent fatigue process is dominant. The Vickers hardness around the path of crack growth was obtained as a measure of damage during creep and creep-fatigue. Complex fracture surface or branched crack is attributed to the decrease in hardness for creep-fatigue interaction and is characterized by fractal analysis.

    本文言語English
    ページ(範囲)41-46
    ページ数6
    ジャーナルStrength, Fracture and Complexity
    4
    1
    出版ステータスPublished - 2006 6月 14

    ASJC Scopus subject areas

    • 凝縮系物理学
    • 材料力学
    • 機械工学

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