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    STP1204

    Estimation of Toughness Degradation by Microhardness and Small Punch Tests

    Published: 0


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    Abstract

    Microhardness and small punch (SP) tests were conducted to improve the reliability of evaluating the ductile-to-brittle transition temperature (DBTT) shift caused by aging (thermal aging, neutron irradiation, cold rolling) using several model alloys (Fe-0.15C alloys and 2¼Cr-1Mo steels). Although evaluation of DBTT by the SP test was good overall, intergranular brittleness could not be detected by SP-DBTT measurement only. By combining other measurements like fractographic observation, however, material degradation can be better evaluated.

    Keywords:

    small punch test, Fe-0.15C alloy, 2¼Cr-1Mo steel, DBTT, microhardness, intergranular fracture, neutron irradiation, temper embrittlement, transgranular fracture, fractography


    Author Information:

    Suzuki, M
    Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken,

    Eto, M
    Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken,

    Nishiyama, Y
    Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken,

    Fukaya, K
    Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken,

    Isozaki, T
    Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken,


    Committee/Subcommittee: E10.08

    DOI: 10.1520/STP12731S