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Development of dispersion-strengthened Ni-Cr-ThOz alloys for the space shuttle thermal protection systemManufacturing processes were developed for TD-NiCr providing small sheet (45 x 90 cm), and larger sheet (60 x 150 cm) and foil. The alternate alloy, DS-NiCr, was produced by pack-chromizing Ni-ThO2 sheet. Formability criteria are being established for basic sheet forming processes, which are brake forming, corrugation forming, joggling, dimpling, and beading. Resistance spot welding (fusion and solid state), resistance seam welding, solid state diffusion welding, and brazing are included in the joining programs. Major emphasis is centered on an Al-modified Ni-Cr-ThO2 alloy development. These alloys, containing 3 to 5% Al, form the protective Al2O3 scale. This enhances oxidation resistance under reentry conditions. Both TD-NiCrAl and DS-NiCrAl alloys are included. A tentative composition of Ni-16Cr-3.5Al-2ThO2 was selected based on oxidation resistance and fabricability.
Document ID
19720010935
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Blankenship, C. P. (NASA Lewis Research Center Cleveland, OH, United States)
Saunders, N. T. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 2, 2013
Publication Date
January 1, 1972
Subject Category
Materials, Nonmetallic
Report/Patent Number
E-6830
NASA-TM-X-68024
Report Number: E-6830
Report Number: NASA-TM-X-68024
Meeting Information
Meeting: Western Metal and Tool Expo.
Location: Los Angeles
Start Date: March 13, 1972
End Date: March 17, 1972
Sponsors: Am. Soc. for Metals, Soc. of Manufacturing Eng.
Accession Number
72N18585
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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