Accession Number : ADA184500

Title :   Ultra-Fine Grained Alloy Material.

Descriptive Note : Contractor rept.,

Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD

Personal Author(s) : Clark,James D ; Kelley,Paul

PDF Url : ADA184500

Report Date : Jun 1987

Pagination or Media Count : 50

Abstract : Thermomechanical processing has been applied to selected alloys to produce enhanced ductility. A fine-grained microstructure at high ductility was produced in eutectic lead-tin and lead-antimony. Melt-extracted fibers of lead-antimony were also produced and exhibited high ductility. Microstructural analyses were performed using optical and X-ray methods. It was concluded that ductility enhancement was due to the presence of large quantities of metastable, disordered grain boundary material.

Descriptors :   *ALUMINUM ALLOYS, *ANTIMONY ALLOYS, *IRON ALLOYS, *COPPER ALLOYS, *BRONZE, *TIN ALLOYS, ZINC, FINE GRAINED MATERIALS, EUTECTICS, THERMOCHEMISTRY, GRAIN BOUNDARIES, ELONGATION, METASTABLE STATE, VISCOUS FLOW, DUCTILITY, MICROSTRUCTURE, CRYSTALLIZATION, TENSILE TESTERS, HARDNESS, X RAY DIFFRACTION, LIFE EXPECTANCY(SERVICE LIFE)

Subject Categories : Properties of Metals and Alloys
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE