Volume 37, Issue 6 (November 2009)

    Performance Evaluation of Resistance Spot Welded Interstitial Free Steel Under Cryogenic Conditions

    (Received 24 May 2008; accepted 27 April 2009)

    Published Online: 2009

    CODEN: JTEOAD

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    Abstract

    Shear tensile (strain rate 102/s) performance of spot welded joints at cryogenic temperatures has been studied considering it as a simple method to indicate the crash resistance performance. The strength of different resistance spot welded joints of interstitial free steel under various heat input conditions has also been evaluated at room temperature for comparison. Micromechanism of fracture of the spot welded joints is investigated by scanning electron microscopy. Although an increase in shear tensile strength with decreasing test temperature is observed in all the spot welds, considerable variations in fracture mode exist in contrast to the room temperature test. The high heat input spot welds remain ductile at all test temperatures, however, low heat input welds become considerably brittle at cryogenic temperatures. Furthermore, medium heat input welds can maintain ductility until 0°C and there is loss of ductility with further lowering of test temperature.


    Author Information:

    Banerjee, Gopa
    Dept. of Metallurgical Engineering, Welding Technology Center, Jadavpur Univ., Kolkata,

    Pal, T. K.
    Dept. of Metallurgical Engineering, Welding Technology Center, Jadavpur Univ., Kolkata,

    Das, Goutam
    National Metallurgical Laboratory, Jamshedpur,


    Stock #: JTE101905

    ISSN: 0090-3973

    DOI: 10.1520/JTE101905

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    Author
    Title Performance Evaluation of Resistance Spot Welded Interstitial Free Steel Under Cryogenic Conditions
    Symposium , 0000-00-00
    Committee A01