The Characteristics of Dispersion-Strengthened Copper Alloys Made by Hot Repressing

Abstract

In order to clarify various properties of DS copper alloys made by hot repressed of internally oxidized Cu-0.33%Al powder, effects of forging temperature, attritor grinding and atomic ratios of O/Al on mechanical properties and electrical conductivity were investigated. Mean density was increased with increasing of forging temperature, and mechanical properties were also improved. About 99.7% of theoretical density was obtained when the forging temperature was above 900°C. Mechanical properties, especially elongation, of the specimens were improved by using attrited powder. The optimum mechanical properties and electrical conductivity were obtained when the atomic ratio of O/Al was nearly equal to 2.2. The anisotropy of strength at elevated temperatures was negligibly small compared with that of the commercial extruded DS copper alloys.