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    Recent Advances in Crack-Arrest Technology

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    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.


    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

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP32554S