Journal Published Online: 23 July 2009
Volume 37, Issue 6

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

CODEN: JTEVAB

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, India
Pal, T.
Dept. of Metallurgical Engineering, Welding Technology Center, Jadavpur Univ., Kolkata, India
Das, Goutam
National Metallurgical Laboratory, Jamshedpur, India
Pages: 7
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Details
Stock #: JTE101905
ISSN: 0090-3973
DOI: 10.1520/JTE101905