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    STP631

    Experimental Verification of the JIc and Equivalent Energy Methods for the Evaluation of the Fracture Toughness of Steels

    Published: 01 January 1977


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    Abstract

    The critical value JIc and the apparent fracture toughness KBd are measured with a single small specimen (compact tension or three-point-bend bar) loaded in the elastic-plastic range. Initiation is detected during loading by an electrical potential method.

    For the steels studied here (2.25Cr-1Mo, electroslag weld, manganese cast steel), the KIc values deduced from JIc are in agreement with the KIc values directly measured with thick specimens in the transition-temperature range. Furthermore, the equivalent energy procedure gives the same results as those obtained by the J-integral method.

    Keywords:

    crack propagation, fracture properties, toughness, crack initiation, steels


    Author Information:

    Marandet, B
    Research engineer and head of Steels Properties Group, Institut de Recherches de la Sidérurgie Francaise, Saint Germain en Laye,

    Sanz, G
    Research engineer and head of Steels Properties Group, Institut de Recherches de la Sidérurgie Francaise, Saint Germain en Laye,


    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP35555S