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Fatigue behavior of SiC reinforced titanium compositesThe low cycle axial fatigue properties of 25 and 44 fiber volume percent SiC/Ti(6Al-4V) composites were measured at room temperature and at 650 deg C. The S-N curves for the composites showed no anticipated improvement over bulk matrix behavior at room temperature. Although axial and transverse tensile strength results suggest a degradation in SiC fiber strength during composite fabrication, it appears that the poor fatigue life of the composites was caused by a reduced fatigue resistance of the reinforced Ti(6Al-4V) matrix. The reduced matrix behavior was due, to the presence of flawed and fractured fibers created near the specimen surfaces by preparation techniques and to the large residual tensile stresses that can exist in fiber reinforced matrices. The effects of fatigue testing at high temperature are discussed.
Document ID
19790022125
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bhatt, R. T. (NASA Lewis Research Center Cleveland, OH, United States)
Grimes, H. H. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1979
Subject Category
Composite Materials
Report/Patent Number
NASA-TM-79223
E-118
Meeting Information
Meeting: Symp. on Fatigue of Fibrous Composite Mater.
Location: San Francisco, CA
Country: United States
Start Date: May 22, 1979
End Date: May 23, 1979
Sponsors: Am. Soc. for Testing and Mater.
Accession Number
79N30296
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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