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Properties of VPPA-Welded 2219-T87 AluminumMetallurgical properties and effects of welding described. Report describes investigation of welding of 2219-T87 aluminum alloy by variable-polarity plasma-arc (VPPA) process. Research was to determine highest strength attainable with this alloy and process and to estimate changes in weld properties caused by variations of process controls. Alloy 2219 strong and heat treatable and retains structural integrity up to 600 degrees F (316 degress C). Is principal structural alloy of Space Shuttle external tank. VPPA process offers many advantages and replaces tungsten/inert-gas process used. In over 24,000 in. (610 m) of welds on tank, there has been no internal defect requiring manual repair.
Document ID
19860000399
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Wilson, W. (Auburn University)
Jemian, W. A.
Date Acquired
August 12, 2013
Publication Date
July 1, 1986
Publication Information
Publication: NASA Tech Briefs
Volume: 10
Issue: 4
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
MFS-27105
Accession Number
86B10399
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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