Evaluation of creep crack growth properties of Gr. 92 steel weldment

M. Tabuchi, A. T. Yokobori, Ryuji Sugiura, M. Yatomi, K. Kobayashi

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    High Cr ferritic heat resistant steels are used for boiler components in ultra-super critical thermal power plants. In weld components of these steels, Type-IV creep damages formed in the fine-grained heat-affected zone (HAZ), causing their creep strength to decrease at high temperatures. To assist the standardization of the testing method for creep crack growth in weld components, we conducted round robin tests using ASME Grade 92 steel as part of the VAMAS TWA31 collaboration. The CCG tests were carried out using the CT specimen and the circumferentially notched round bar specimen for both the base metal and weld joint of Gr. 92 steel. The effects of specimen configuration, temperature, load and stress triaxiality conditions on the crack initiation and growth properties were investigated.

    Original languageEnglish
    Pages (from-to)137-146
    Number of pages10
    JournalStrength, Fracture and Complexity
    Volume7
    Issue number2
    DOIs
    Publication statusPublished - 2011

    Keywords

    • FEM
    • Gr. 92 steel
    • Type-IV failure
    • creep crack growth
    • weld joint

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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  • Cite this

    Tabuchi, M., Yokobori, A. T., Sugiura, R., Yatomi, M., & Kobayashi, K. (2011). Evaluation of creep crack growth properties of Gr. 92 steel weldment. Strength, Fracture and Complexity, 7(2), 137-146. https://doi.org/10.3233/SFC-2011-0132