Investigation of Dynamic JId for Alloy Steel Weldments Using the Split Hopkinson Bar

    Volume 14, Issue 5 (September 1986)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 7


    Bassim, MN
    Professor, Research Associate, and Professor, University of Manitoba, Winnipeg, Manitoba

    Bayoumi, MR
    Professor, Research Associate, and Professor, University of Manitoba, Winnipeg, Manitoba

    Hsu, TR
    Professor, Research Associate, and Professor, University of Manitoba, Winnipeg, Manitoba

    Matthews, JR
    Defence Scientist, Defence Research Establishment Atlantic, Dartmouth, Nova Scotia

    (Received 6 August 1985; accepted 13 March 1986)

    Abstract

    The fracture toughness parameter JId, under dynamic loading conditions, was determined for weldments of HY80 and QT28 alloy steels using a split Hopkinson bar technique. JId was obtained for the fusion zone, the heat-affected zone, and the base metal for these steels as a function of temperature in the range of −80 to 25°C and at loading rates of ˙K = 106 MPa√m s−1. Wedge loaded compact tension specimens were loaded in a split Hopkinson bar. The onset of stable crack growth was determined by using a strain gage that was attached ahead of a fatigue crack. The results show that, at −80°C, fracture with limited stable crack growth takes place, while for all other testing conditions considerable ductility precedes fracture of these alloys.


    Paper ID: JTE10334J

    DOI: 10.1520/JTE10334J

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    Title Investigation of Dynamic JId for Alloy Steel Weldments Using the Split Hopkinson Bar
    Symposium , 0000-00-00
    Committee E08