Control of porosity in weld beads was major objective in development of aluminum welding program. Porosity, most difficult defect to control, is caused by hydrogen gas unable to escape during solidification. Hard tooling allows hotter bead than free-fall tooling so hydrogen bubbles can boil out instead of forming pores. Welding position, moisture, and cleanliness are other important factors in control of porosity.


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    Title :

    Technology of welding aluminum alloys-III


    Contributors:

    Published in:

    Publication date :

    1978-03-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    Technology of welding aluminum alloys-I

    Harrison, J. R. / Korb, L. J. / Oleksiak, C. E. | NTRS | 1978



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    Ginez, R. / Lewis, J. R. / Millett, A. U. et al. | NTRS | 1978


    Resistance welding of aluminum alloys

    Fassler, P.W. | Engineering Index Backfile | 1937