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In this work, the commercial age-hardenable Cu-0.81Cr-0.07Zr alloy was solution heat treated at 930°C and 1020°C and processed at room temperature by 1 and 4 equal-channel angular pressing (ECAP) passes through routes A and BC. Aging treatments were performed in the ECAPed and as-solubilized samples. The effects of processing and heat treatments on hardness and electrical conductivity were analyzed and correlated with microstructural evolution. It was found that during ECAP, grain refinement and dislocation hardening were the predominant hardening mechanisms. The electrical conductivity was mainly affected by the amount of solute in solid solution, being practically unaffected by the deformation caused by ECAP. It was observed that the precipitation kinetics were accelerated in the samples processed by ECAP, resulting in a decrease in the peak aging temperature. After 4 passes of ECAP followed by aging, the samples reached peak hardness of 193 HV and 201 HV for samples solubilized at 930°C and 1020°C, respectively. These values correspond to a 13% and 18% increase in hardness compared to commercial Cu-Cr-Zr alloys produced by a conventional solution heat treatment/cold working-aging route. Furthermore, the electrical conductivity remained above 70% IACS after ECAP-aging, which is still very attractive for electrical applications.

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