STP668

    Characterization of Plate Steel Quality Using Various Toughness Measurement Techniques

    Published: Jan 1979


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    Abstract

    The fracture toughness properties of three steels (A516-70, A533B Class 1, and HY-130) are determined in two steel-quality levels (conventional and calcium treated). In addition, a conventional quality A543B Class 1 steel is similarly examined at two locations (quarterline and centerline). Both investigations involved comparing steels with differing inclusion structures. The primary effort was to establish the upper-shelf toughness differences found using the Charpy V-notch impact and dynamic tear tests compared with those found using J-integral determinations of JIc and KIc. The JIc determinations appeared to be more sensitive to changes in inclusion structure than either the Charpy V-notch or dynamic tear tests. This was established by comparing the toughness between quality levels and by measuring the anisotropy of toughness within a steel. Comparisons are made with the Charpy V-notch impact-KIc upper-shelf correlation values. Comments concerning the suggested graphical method for JIc determination are also given.

    Keywords:

    crack propagation, fractures (materials), inclusions, steels, plastic properties


    Author Information:

    Wilson, AD
    Research engineer, Lukens Steel Company, Coatesville, Pa.


    Paper ID: STP35844S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP35844S


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