Volume 28, Issue 4 (July 2000)

    Development of Small Punch Tests for Creep Property Measurement of Tungsten-Alloyed 9%Cr Ferritic Steels

    (Received 12 October 1999; accepted 7 April 2000)

    CODEN: JTEOAD

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    Abstract

    A small punch creep (SP-C) testing technique using miniaturized specimens has been demonstrated for evaluating creep properties and material deterioration due to thermal aging. This technique has been applied to tungsten-alloyed 9%Cr ferritic steels. Experimental results revealed that the overall shapes of the creep curves obtained from the SP-C tests were qualitatively similar to those obtained from conventional uniaxial creep tests and reflected closely the degradation of creep rupture strength of the materials. A correlation with uniaxial creep was also determined in terms of stress (load) exponent and apparent activation energy for creep deformation. The correlation suggests that the SP-C testing technique may provide a useful tool for evaluating degradation of creep properties for structural components in-service.


    Author Information:

    Komazai, S
    Research associate, Akita Prefectural University, Akita,

    Hashida, T
    Professor, Tohoku University, Sendai,

    Shoji, T
    Directorprofessor, Tohoku University, Sendai,

    Suzuki, K
    Engineer, Tohoku Electric Power Co., Inc., Sendai,


    Stock #: JTE12102J

    ISSN: 0090-3973

    DOI: 10.1520/JTE12102J

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    Author
    Title Development of Small Punch Tests for Creep Property Measurement of Tungsten-Alloyed 9%Cr Ferritic Steels
    Symposium , 0000-00-00
    Committee E28