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Physics Of Variable-Polarity Plasma Arc WeldingReport 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.
Document ID
19900000077
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Walsh, Daniel W.
(Alabama Univ.)
Nunes, Arthur C., Jr.
(Alabama Univ.)
Date Acquired
August 14, 2013
Publication Date
February 1, 1990
Publication Information
Publication: NASA Tech Briefs
Volume: 14
Issue: 2
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
MFS-27207
Accession Number
90B10077
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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