Accession Number : ADA299172

Title :   Control of Interface Properties of Light Metal Composites through In-situ Metallurgical Processing.

Descriptive Note : Final rept.,

Corporate Author : METAL MATRIX COMPOSITE CASTINGS INC WALTHAM MA

Personal Author(s) : Cornie, James A. ; Seleznev, Maxim L. ; Zhang, Shi-yu ; Ryals, Mark A.

PDF Url : ADA299172

Report Date : 02 SEP 1994

Pagination or Media Count : 55

Abstract : The properties of continuously reinforced aluminum composites have been notoriously unpredictable and prone to extreme scatter. Early results from MIT studies that preceded this study showed that matrix metallurgy was important in yet to be understood ways. As MMCC and MIT researchers working in collaboration investigated the phenomena, we discovered that controlled equilibrium precipitation on the fiber surface could be used to control interfacial delamination, long recognized as necessary for toughening of continuously reinforced metal matrix composites. This report summarizes our present understanding of this phenomena and points the way toward applying deep metallurgical understanding to the use of commercial alloys to optimize the mechanical behavior of continuously reinforced MMCs. jg p.9

Descriptors :   *INTERFACES, *METAL MATRIX COMPOSITES, *METALLURGY, CONTROL, SCATTERING, FIBERS, MECHANICAL PROPERTIES, PROCESSING, COMPOSITE MATERIALS, TOUGHNESS, EQUILIBRIUM(GENERAL), ALLOYS, PRECIPITATION, SURFACE PROPERTIES, ALUMINUM, LIGHTWEIGHT, CONTINUITY, DELAMINATION, REINFORCING MATERIALS.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Laminates and Composite Materials
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE