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Hot vacuum creep forming of scale shuttle external tank dome capsThe feasibility of forming shuttle external tank dome caps by hot vacuum creep was investigated for a sub-scale configuration. Aluminum 2219-T37 at an elevated temperature equivalent to the artificial aging time and temperature was used to produce the T87 condition while achieving MIL-HBK -5 properties of 2219-T87 aluminum alloy material. A feasibility analysis was conducted in two phases: the design and build of a sub-scale hot vacuum creep forming (HVCF) die and the forming evaluation of various cap configurations. The contour was constant in all evaluations. This configuration was found to be too severe for the limited forming force available by HVCF.
Document ID
19750004943
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Thomas, A. O. (Avco Corp. Nashville, TN, United States)
Date Acquired
September 3, 2013
Publication Date
September 12, 1974
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
NASA-CR-120542
R-1131
Accession Number
75N13015
Funding Number(s)
CONTRACT_GRANT: NAS8-30664
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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