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An Assessment of a Titanium Alloy for Supersonic Transport OperationsAn assessment is given of the materials problems and implications regarding the use of Ti-8Al-1Mo-IV alloy sheet for the skin of a supersonic transport. Although the assessment of this alloy in the duplex annealed condition is generally favorable, several questions remain unanswered and new ones continue to arise. The seriousness of the salt stress corrosion problem at 500 F and above under flight conditions cannot be predicted on the basis of current laboratory corrosion tests. A new potential stress corrosion problem at ambient temperatures in the presence of cracks and salt water requires investigation. The ability to withstand a 30,000-hour exposure at 550 F without undue degradation of the material or welds will remain doubtful until more long-time data are available. The substitution of a more corrosion-resistant and stable titanium alloy in the tension critical areas of the structure may prove advisable.
Document ID
20000011991
Document Type
Conference Paper
Authors
Heimerl, George J. (NASA Langley Research Center Hampton, VA United States)
Hardrath, Herbert F. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1965
Publication Information
Publication: NASA Conference on Aircraft Operating Problems: A Compilation of the Papers Presented
Subject Category
Metals and Metallic Materials
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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