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Gas Contamination In Plasma-Arc-Welded AluminumDocument describes experimental investigation on visible and tactile effects of gaseous contaminants in variable-polarity plasma arc (VPPA) welding of 2219 T-87 aluminum alloy. Contaminant gases (nitrogen, methane, oxygen, and hydrogen) introduced in argon arc and in helium shield gas in various controlled concentrations. Report represents results of experiments in form of photographs of fronts, backs, polished cross sections, and etched cross sections of welds made with various contaminants at various concentrations. Provides detailed discussion of conditions under which welds made.
Document ID
19920000053
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Mcclure, John C.
(Texas Univ.)
Torres, Martin R.
(Texas Univ.)
Gurevitch, Alan C.
(Texas Univ.)
Newman, Robert A.
(Texas Univ.)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Publication Information
Publication: NASA Tech Briefs
Volume: 16
Issue: 1
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
MFS-27233
Accession Number
92B10053
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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