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Tungsten wire-nickel base alloy composite developmentFurther development and evaluation of refractory wire reinforced nickel-base alloy composites is described. Emphasis was placed on evaluating thermal fatigue resistance as a function of matrix alloy composition, fabrication variables and reinforcement level and distribution. Tests for up to 1,000 cycles were performed and the best system identified in this current work was 50v/o W/NiCrAlY. Improved resistance to thermal fatigue damage would be anticipated for specimens fabricated via optimized processing schedules. Other properties investigated included 1,093 C (2,000 F) stress rupture strength, impact resistance and static air oxidation. A composite consisting of 30v/o W-Hf-C alloy fibers in a NiCrAlY alloy matrix was shown to have a 100-hour stress rupture strength at 1,093 C (2,000 F) of 365 MN/square meters (53 ksi) or a specific strength advantage of about 3:1 over typical D.S. eutectics.
Document ID
19760018265
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Brentnall, W. D. (TRW, Inc. Cleveland, OH, United States)
Moracz, D. J. (TRW, Inc. Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
March 1, 1976
Subject Category
Composite Materials
Report/Patent Number
ER-7849
NASA-CR-135021
Accession Number
76N25353
Funding Number(s)
CONTRACT_GRANT: NAS3-17816
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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