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Mechanical properties of coated titanium Beta-21S after exposure to air at 700 and 800 CMechanical properties of Beta-21S (Ti-15Mo-3Al-2.7Nb-0.2Si, wt percent) with glass, aluminide, and glass-on-aluminide coatings less than 3-micron thick were studied. Coatings were deposited by sol-gel processing or electron-beam evaporation onto 4.5-mil (113-micron) thick Beta-21S sheet from which, after oxidizing in air at 700 or 800 C, tensile test specimens were machined. Plastic elongation was the most severely degraded of the tensile properties; the glass-on-aluminide coatings were the most effective in preventing degradation. It was found that oxygen trapping by forming oxides in the coating, and reactions between the coatings and the Beta-21S alloy played significant roles.
Document ID
19920020962
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Wiedemann, Karl E.
(Analytical Services and Materials, Inc., Hampton VA., United States)
Bird, R. Keith
(NASA Langley Research Center Hampton, VA, United States)
Wallace, Terryl A.
(NASA Langley Research Center Hampton, VA, United States)
Clark, Ronald K.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1992
Subject Category
Metallic Materials
Report/Patent Number
NAS 1.15:104220
NASA-TM-104220
Report Number: NAS 1.15:104220
Report Number: NASA-TM-104220
Meeting Information
Meeting: World Conference on Titanium
Location: San Diego, CA
Country: United States
Start Date: June 29, 1992
End Date: July 2, 1992
Accession Number
92N30205
Funding Number(s)
PROJECT: RTOP 506-43-71-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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