Optimizing the Electrical and Mechanical Properties of Cu-Cr Alloys by Hf Microalloying

Cu-0.4Cr (wt.%) alloys with the microalloying of Hf elements were subjected to a modified rolling–aging process achieve high strength, electrical conductivity and ductility simultaneously. Transmission electron microscopy X-ray line broadening analysis conducted characterize microstructures these alloys. Deformation twins high-density dislocations introduced into copper via Hf, improving mechanical properties The Cu-Cr-Hf alloy reduced content performed well in terms ductility. 0.4 wt.% was sufficient good combination tensile strength (593 MPa), uniform elongation (~5%) (80.51% IACS).