Influence of deformation processing on tensile response of dispersion strengthened copper

Abstract

The influence of deformation processing on microstructure, tensile deformation, and fracture behaviour of an oxide dispersion strengthened copper alloy is presented and discussed. The strength of the alloy, in both the drawn and extruded microstructural conditions, decreased with an increase in test temperature. At a given temperature, the strength of the drawn microstructure was superior to that of the extruded counterpart. For both the drawn and extruded microstructures, the alloy maintained a high value of yield strengthultimate tensile strength ratio. The tensile fracture behaviour of the alloy was identical for both the drawn and extruded microstructures. Tensile deformation was essentially by inhomogeneous planar slip in the copper matrix and at locations remote from the dispersoid particles.