Characterization of structural embrittlement of creep crack growth for W-added 12%Cr ferritic heat-resistant steel related to the multiaxial stress

Ryuji Sugiura, Toshimitsu Yokobori, Masaaki Tabuchi, Akio Fuji, Takeshi Adachi

    Research output: Contribution to journalArticlepeer-review

    17 Citations (Scopus)

    Abstract

    In components under static creep loading condition, the multiaxial stress fields appear due to the plastic constraint and they produce a more brittle type cracking behavior. From a practical standpoint, the characterizations of creep crack growth rates under the multiaxial stress field are important to improve the methods for creep life extension. In this paper, creep crack growth tests were conducted using round bar specimens with sharp circular notches for tungsten-added 12%Cr ferritic heat-resistant steel (W12%Cr steel), and the effect of multiaxiality on creep ductility and creep crack growth rate were investigated. Furthermore, three-dimensional elastic-plastic creep finite element analyses were conducted to clarify the effect of multiaxiality on creep crack growth.

    Original languageEnglish
    Pages (from-to)110041-110049
    Number of pages9
    JournalJournal of Engineering Materials and Technology, Transactions of the ASME
    Volume131
    Issue number1
    DOIs
    Publication statusPublished - 2009 Jan 1

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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