STP833

    Recent Advances in Crack-Arrest Technology

    Published: Jan 1984


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    Abstract

    Statistical analysis of the variability of crack-arrest toughness (Ka) is reviewed. The standard deviation of Ka is 12 MPa · m1/2 for an individual heat of low-alloy steel and 15 MPa · m1/2 when data for all heats are referred to the Charpy 41-J (30 ft-lb) temperature. These results aid in the definition of acceptable size limitations for crack-arrest test specimens. Miniature specimens (50 by 50 by 12.7 mm) are shown to give acceptably conservative results when tested in the vicinity of the reference transition temperature.

    Keywords:

    crack arrest, reactor pressure vessel steels, fracture statistics, lower-bound toughness, specimen-size effects


    Author Information:

    Rosenfield, AR
    Battelle-Columbus Laboratories, Columbus, Ohio

    Mincer, PN
    Battelle-Columbus Laboratories, Columbus, Ohio

    Marschall, CW
    Battelle-Columbus Laboratories, Columbus, Ohio

    Markworth, AJ
    Battelle-Columbus Laboratories, Columbus, Ohio


    Paper ID: STP32554S

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP32554S


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