Accession Number : AD0706883

Title :   ALUMINUM - GRAPHITE COMPOSITES.

Descriptive Note : Rept. Jul 69-Feb 70,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Pepper,Roger T. ; Upp,John W. ; Rossi,Ronald C. ; Kendall,E. George

Report Date : 01 APR 1970

Pagination or Media Count : 33

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)

Descriptors :   (*COMPOSITE MATERIALS, *CARBON FIBERS), (*ALUMINUM, COMPOSITE MATERIALS), TEST METHODS, TENSILE PROPERTIES, GRAPHITE

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE