Tests show that slowly rising condenser-discharge preheat current with rapidly rising welding current affords no less expulsion than rapidly rising welding current alone, and is inferior to slowly rising welding current alone; postheating had no effect on shear strength until current was sufficient to remelt welds.


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    Title :

    Effect of preheating and postheating on quality of spot welds in aluminum alloys


    Additional title:

    Nat Advisory Committee Aeronautics -- Tech Note


    Contributors:
    Hess, W.F. (author) / Wyant, R.A. (author) / Winsor, F.J. (author)


    Publication date :

    1947


    Size :

    20 pages


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English







    Evaluation of friction spot welds in aluminum alloys

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