Effects of alloying additions and material structures on the high accuracy of the predictive law of creep crack growth for W strengthened 9-12% Cr ferritic heat resistant steel

Ryuji Sugiura, Toshimitsu Yokobori, Shinjyu Takamori, Masaaki Tabuchi, Akio Fuji, Mitsuo Yoda, Kenichi Kobayashi, Takeo Yokobori

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    The life of creep crack growth for W strengthened 9-12%Cr steel is sensitive to the alloying additions and material structures, such as lath martensitic structure and grain size caused by inhomogeneous cooling rate in steel ingot during the manufacturing stage, which results in the large scattering of experimental data from the law of creep crack growth life. In this paper, creep crack growth tests were conducted using W strengthened 9-12%Cr steels with various contents of alloying additions and the dimensions of micro-nano structures. The effects of the composition of alloying additions and material structures on the life of creep crack growth for W strengthened 9-12%Cr steel were clarified.

    Original languageEnglish
    Pages (from-to)452-460
    Number of pages9
    JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
    Volume70
    Issue number5
    DOIs
    Publication statusPublished - 2006 May 1

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Mechanics of Materials
    • Metals and Alloys
    • Materials Chemistry

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