Quantitative study of W-alloyed 9-12 Cr steel microstructures using EBSD

V. A. Yardley, R. Sugiura, T. Matsuzaki, S. Tsurekawa, A. T. Yokobori, Y. Hasegawa

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    Abstract

    Ferritic/martensitic steels for use in power generation, such as the modified 9-12 wt% Cr alloy P92, are required to withstand temperatures of 450-600°C or more for several decades. Under such conditions, one major failure mode is creep fracture, so reliable prediction of the growth lifetime of creep cracks is important. Lifetimes depend on many factors including temperature, specimen geometry and material microstructure. In the present paper, electron backscatter diffraction (EBSD) is used to quantify the microstructural differences between two steel samples that performed very differently in creep crack growth tests despite similar compositions and preparation routes.

    Original languageEnglish
    Pages (from-to)39-52
    Number of pages14
    JournalStrength, Fracture and Complexity
    Volume5
    Issue number1
    Publication statusPublished - 2007 Dec 1

    Keywords

    • Creep crack
    • Electron backscatter diffraction
    • Martensitic block
    • Martensitic packet
    • Martensitic steel
    • Orientation imaging
    • P92
    • Prior austenite grain

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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