Volume 26, Issue 3 (May 1998)

    Crack Arrest Fracture Toughness Testing of Naval Construction Steels

    (Received 4 February 1997; accepted 10 October 1997)

    CODEN: JTEOAD

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    Abstract

    A program was undertaken to apply the ASTM E 1221 test method to two submarine steels exhibiting high ratios of toughness to yield stress. The objective was to measure the capacities of these steels and representative shipyard welds to arrest fast running cracks. Although the method is not a measure of dynamic toughness, it was considered to be a procedure capable of comparing the crack arresting abilities of these steels.

    The work has shown that it is possible to follow ASTM E 1221 and obtain valid crack arrest fracture toughness results for materials with room temperature KJc as high as 240 MPa√m and a yield stress of 690 MPa using specimens of 50-mm thickness. The process did, however, have a high level of unreliability, necessitating a large number of tests and extensive re-testing to obtain valid results. Test temperatures below −60°C were required to obtain run-arrest events, and as such could not easily be related to material qualification procedures such as explosion bulge testing or to submarine operating temperatures.


    Author Information:

    Burch, IA
    Aeronautical and Maritime Research Laboratory, Defence Science and Technology Organisation, Melbourne, Vic

    Ritter, JC
    Aeronautical and Maritime Research Laboratory, Defence Science and Technology Organisation, Melbourne, Vic

    Saunders, DS
    Aeronautical and Maritime Research Laboratory, Defence Science and Technology Organisation, Melbourne, Vic

    Underwood, JH
    U.S. Army Armament, RD & E Center, Watervliet, New York,


    Stock #: JTE12001J

    ISSN: 0090-3973

    DOI: 10.1520/JTE12001J

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    Author
    Title Crack Arrest Fracture Toughness Testing of Naval Construction Steels
    Symposium , 0000-00-00
    Committee D01