The Effects of Specimen Thickness and Stress Relief on Fatigue Crack Growth Rate in Nickel-Chromium-Molybdenum-Vanadium Steel

    Volume 5, Issue 2 (March 1977)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 6


    Sullivan, AM
    MetallurgistsMembers of ASTM, Engineering Materials Division, Naval Research Laboratory, Washington, D.C.,

    Crooker, TW
    MetallurgistsMembers of ASTM, Engineering Materials Division, Naval Research Laboratory, Washington, D.C.,

    Abstract

    Structural design now incorporates the weight-saving advantage of high-strength alloys by reducing the thickness requirements of load-bearing members. For fail-safe applications of thin-section material [less than 0.50 in. (12.7 mm) thick] in high-performance ship structures, quantitative information concerning fatigue crack growth rate (FCGR) is highly important. The paucity and diverse conclusions of presently available information concerning the effect of material thickness on FCGR provides little engineering guidance for the design of thin-section structures. This study of FCGR on a 5Ni-Cr-Mo-V steel tested in three thicknesses indicates that internal residual stresses may have a retardation effect on FCGR in this material. When the material was tested after stress relief, crack growth was accelerated and was essentially the same for all thicknesses.


    Paper ID: JTE10668J

    DOI: 10.1520/JTE10668J

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    Author
    Title The Effects of Specimen Thickness and Stress Relief on Fatigue Crack Growth Rate in Nickel-Chromium-Molybdenum-Vanadium Steel
    Symposium , 0000-00-00
    Committee E08