STP738: Influence of Various Parameters on the Determination of the Fatigue Crack Arrest Threshold

    Amzallag, C
    Research engineer and Head of Department of Mechanics, Creusot-Loire, Centre de Recherches, Firminy,

    Rabbe, P
    Research engineer and Head of Department of Mechanics, Creusot-Loire, Centre de Recherches, Firminy,

    Bathias, C
    Professor, Université de Technologie de Compiègne, Compiègne,

    Benoit, D
    Research engineer, Institut de Recherches de la Sidérurgie Française, Saint Germain-enLaye,

    Truchon, M
    Research engineer, Institut de Recherches de la Sidérurgie Française, Saint Germain-enLaye,

    Pages: 16    Published: Jan 1981


    Abstract

    This report presents the results of a round-robin work on the fatigue crack arrest threshold (ΔKth) of 2618 aluminium alloy and AISI 316 steel. The main purpose was to develop a method for the determination of ΔKth, and to examine the influence of various test parameters on this threshold. Among the parameters considered, only the load ratio (R) and the environment (vacuum) appear to have a significant influence on very slow fatigue crack growth rates (FCGR). Moreover, while the results obtained with the 316 steel show a great scatter, the importance of the adopted procedure is pointed out.

    Keywords:

    fatigue testing, fatigue crack growth, crack arrest threshold, test procedure


    Paper ID: STP33450S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP33450S


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