Accession Number : AD0260214

Title :   FIBER-REINFORCED METALS AND ALLOYS

Corporate Author : IIT RESEARCH INST CHICAGO ILL

Personal Author(s) : KOPPENAAL,T.J. ; PARIKH,N.M.

Report Date : 27 JUN 1961

Pagination or Media Count : 12

Abstract : Studies are being made of fiber-reinforced metals and alloys to evaluate their mechanical properties The deformation characteristics of v rious composites were studied to determine: (1) the strengthening mechanism of the composite and (2) why the yield strength is dependent upon the type of fiber. micro-yield measurements were made on composite specimens of Ag-10% mild steel and Ag-30% mild steel fibers (0.0025 to 0.003 in. in diameter, and on Ag with 30% fibers of mild steel, Mo, and heat-treated (hardened) type 410 stainless steel. The surface of a Cu-30% Mo fiber composite was polished and examine metallographically as a function of strain. Failed sections of Cu-10% and -40% Mo fiber composites were examined. Three important features in the deformation behavior of fiberreinforced metals are: (1) for a given type of fiber, the rate of work hardening is highly dependent on fiber density at small plastic trains, and relatively independent of fiber density at high strains; (2) for the initial 2% elongation, deformation is restricted to the softer matrix; and (3) for a given matrix, fiber size, and fiber density, the yield strength at small strains is nearly indepe dent of the type of fiber, but becomes significantly dependent at higher strain .

Descriptors :   *ALLOYS, *COPPER, *METALS, *MOLYBDENUM, *SILVER, *STAINLESS STEEL, *STEEL, DEFORMATION, DETERMINATION, FIBERS, HARDENING, HEAT TREATMENT, MECHANICAL PROPERTIES, METALLIC TEXTILES, PLASTIC PROPERTIES, REINFORCING MATERIALS, STRESSES, WIRE

Distribution Statement : APPROVED FOR PUBLIC RELEASE