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    Volume 20, Issue 3 (May 1992)

    Fatigue Threshold Regime of a Low Alloy Ferritic Steel under Closure-Free Testing Conditions: Part I—Compliance Variations in the Threshold Regime

    (Received 14 May 1991; accepted 10 October 1991)

    Published Online: 01 May 1992

    CODEN: JTEVAB

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    Abstract

    Compliance variations in the threshold regime of a high strength ferritic steel tested under closure-free conditions at room temperature and in air are reported. In contrast to the Paris regime, and irrespective of whether the data during load shedding, at threshold, or after post-threshold load increase are considered. it is found that compliance varies inconsistently in the threshold regime. Therefore a 1:1 correlation between the averaged optical crack length and that inferred from compliance was not observed. Possible reasons of this discrepancy are discussed, and the crack front lag inferred is explained in terms of the constraint.


    Author Information:

    Vaidya, WV
    Metallurgist, Institut für Werkstofforschung. GKSS-Forschungszentrum Geesthacht GmbH, Geesthacht,


    Stock #: JTE11709J

    ISSN:0090-3973

    DOI: 10.1520/JTE11709J

    Author
    Title Fatigue Threshold Regime of a Low Alloy Ferritic Steel under Closure-Free Testing Conditions: Part I—Compliance Variations in the Threshold Regime
    Symposium ,
    Committee E08