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    Effect of Decarburization on Fracture Toughness of an Ultrahigh-Strength Sheet Steel

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    In recent years the problem of brittle fracture has been one of great importance to fabricators of solid-propellant missile-motor cases, and many tests have been developed to determine the “fracture toughness” of sheet materials as a measure of their resistance to rapid crack propagation (1). After studying many of the tests proposed for the evaluation of fracture toughness, a special ASTM committee recommended the center-notch tension test for the screening of materials in laboratory tests (2).

    Author Information:

    Sheehan, J. P.
    Armour Research Foundation, Chicago, Ill.

    Manning, R. D.
    U. S. Steel Corp., Applied Research Laboratory, Monroeville, Pa.

    Committee/Subcommittee: F07.07

    DOI: 10.1520/STP45098S