DEFORMATION BEHAVIOR IN METAL FIBER-METAL MATRIX COMPOSITES.
ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS
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A model system, brass-tungsten, was used to study the effect of multiple fiber necking, strain rate, and fiber surface condition on the ductility and deformation behavior of uniaxial metal matrix composites. Low volume percent 20 vo composites were made using brass 90Cu-10Zn powders and tungsten wires. Multiple necking of tungsten wires in a brass matrix was found to be a result of a load transfer from the wire to the surrounding matrix. Composite ductility was shown to increase with decreasing multiple neck spacing and increasing reduction of area at the neck and was generally independent of strain rate. The ability of metal matrix composites to undergo simple forming operations such as cold rolling and closed-die forging was also shown. Author
- Laminates and Composite Materials