STP1074

    Analysis of Fracture Toughness Data for Modified SA508 Cl2 in the Ductile-to-Brittle Transition Region

    Published: Jan 1990


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    Abstract

    Fracture toughness testing of steels in the ductile-to-brittle transition region is complicated by a large amount of data scatter. There are many available methods of analyzing transition region toughness data with the objective of reducing the data scatter and arriving at a representative value for the lower bound toughness. Ten 1T and five 4T compact specimens of SA508 C12 pressure vessel steel given a special heat treatment were tested in the transition region, and the data were analyzed according to six of the available methods. Of three purely statistical methods, one based on a large collection of pressure vessel and rotor steel data is preferred. Of three analytical methods, one which subtracts the contributions of plasticity and crack growth from measured toughness is preferred.

    Keywords:

    K, Ic, J, Ic, fracture toughness, ductile, brittle, cleavage, steel, A508, SA508, pressure vessel steel, low alloy steel


    Author Information:

    Miglin, MT
    Babcock and Wilcox Company, Alliance Research Center, Alliance, OH

    Wade, CS
    Babcock and Wilcox Company, Alliance Research Center, Alliance, OH

    Van Der Sluys, WA
    Babcock and Wilcox Company, Alliance Research Center, Alliance, OH


    Paper ID: STP18998S

    Committee/Subcommittee: E08.04

    DOI: 10.1520/STP18998S


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