ALUMINUM - GRAPHITE COMPOSITES.
Abstract
Room temperature uniaxial tensile tests have shown that composites of eutectic aluminum - silicon alloy and Thornel 50 graphite fibers have strengths greater than a theoretical value that was calculated on the basis of the law of mixtures. At 28 vol % fibers, the average uniaxial tensile strength was found to be 106,000 psi, and several values between 130,000 and 144,000 psi were obtained. The modes of fracture in the composites have been studied by the microexamination of polished surfaces and fractures of tested specimens. Specimens of the composite have been thermally cycled between -193C and +20C and -193C and +500C 20 times. Tensile tests and microexamination of the thermally cycled specimens show that thermal cycling does not degrade the tensile properties of the composites or change their microstructure. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1970
- Accession Number
- AD0706883
Entities
People
- E. George Kendall
- John W. Upp
- Roger T. Pepper
- Ronald C. Rossi
Organizations
- The Aerospace Corporation