Report describes experimental study of some of the physical and chemical effects that occur during variable-polarity plasma arc (VPPA) keyhole welding of 2219 aluminum alloy. Comprised three major programs: (1) determination of effects of chemical additions (i.e., impurities) on structure and shape of bead and keyhole; (2) determination of flow in regions surrounding keyhole; (3) development of analog used easily to study flow in keyhole region.
Physics Of Variable-Polarity Plasma Arc Welding
NASA Tech Briefs ; 14 , 2
1990-02-01
Miscellaneous
No indication
English
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