STP463

    Application of Fracture Mechanics Technology to Medium-Strength Steels

    Published: Jan 1970


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    Abstract

    A review of fracture toughness and fatigue crack growth rate data currently available for medium-strength steels is presented. Data are included for three commonly used structural steels (AISI 1045, 1144, and 4140); two pressure vessel steels (ASTM A533 Grade B, Class 1 and A216 WCC grade); and three grades of rotor forging steels (ASTM A469, Class 4; A470, Class 8; and A471, Class 4). These data clearly illustrate that under conditions of sufficient restraint to ensure plane strain loading, existing linear elastic fracture mechanics technology is applicable to medium-strength steels. The advantages and overall potential of fracture mechanics technology as a quantitative tool for the prevention of failure is demonstrated by means of an example problem.

    Keywords:

    fracture mechanics, fractures (materials), pressure vessels, toughness, fatigue, cracks, fracture strengths, steels, evaluation, tests


    Author Information:

    Clark, WG
    Senior engineer and managerpersonal member, Westinghouse Research LaboratoriesASTM, Pittsburgh, Pa.

    Wessel, ET
    Senior engineer and managerpersonal member, Westinghouse Research LaboratoriesASTM, Pittsburgh, Pa.


    Paper ID: STP33666S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP33666S


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