Effect of local multi-axial stress on creep crack growth behavior in the heat affected zone

Ryuji Sugiura, A. Toshimitsu Yokobori, Kazuto Suzuki, Masaaki Tabuchi

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    Under the multi-axial stress field, creep crack growth is considered to occur in brittle manner. From the view point of practical use, it is important to conduct the characterizations of the creep crack growth rate and its life under the multi-axial stress field to predict the life of creep crack growth. In the present study, for the welded joint of the W-added 9Cr ferritic heat-resistant steel, ASME Code Case 2179/ASTM A335 P92, creep crack growth tests and 3-dimensional elastic-plastic creep finite element analyses were conducted to clarify the effect of stress multi-axiality on creep crack growth. As a result, the creep ductility of welded joint was found to decrease and shift to the creep brittle region as compared with that of base metal due to the large value of stress tri-axial factor TF.

    Original languageEnglish
    Pages (from-to)361-368
    Number of pages8
    JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
    Volume95
    Issue number4
    DOIs
    Publication statusPublished - 2009

    Keywords

    • Creep crack growth
    • Finite element analysis
    • Multi-axial stress
    • W-added 9Cr ferritic heat-resistant steel
    • Welded joint

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Physical and Theoretical Chemistry
    • Metals and Alloys
    • Materials Chemistry

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