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Resistance spot welding of galvanized steel: Part II. Mechanisms of spot weld nugget formation

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Abstract

Dynamic inspection monitoring of the weld current, voltage, resistance, electrode displacement, and force was performed in conjunction with a detailed study of the effects of material variations and weld process parameter modifications on resistance spot welding of coated and uncoated steels. In order to determine the mechanisms of weld nugget formation and growth, scanning electron microscopy photos were taken of the developing nugget. These physical changes were then related to the dynamic inspection curves and the welding current lobe. The effects of material variations and weld process modifications, the results of which were presented in Part I, can be explained through an understanding of these mechanisms.

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Authors and Affiliations

  1. United States Army Materials Technology Laboratory, 02172-0001, Watertown, MA

    S. A. Gedeon (Welding Research Scientist)

  2. Massachusetts Institute of Technology, 02139, Cambridge, MA

    T. W. Eagar (Associate Professor)

Authors
  1. S. A. Gedeon
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  2. T. W. Eagar
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Gedeon, S.A., Eagar, T.W. Resistance spot welding of galvanized steel: Part II. Mechanisms of spot weld nugget formation. Metall Trans B 17, 887–901 (1986). https://doi.org/10.1007/BF02657152

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  • DOI: https://doi.org/10.1007/BF02657152

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