Effect of combining the equal-channel angular hydroextrusion, direct hydroextrusion and drawing on properties of copper wire

Effect of combined processing by the equal-channel angular hydroextrusion (ECAH), direct hydroextrusion (HE) and drawing (D) on properties of copper wire is discussed in the paper. The technique has been for the first time employed for hardening lengthy copper rods and wire and reaching the ultimate tensile strength σ = 686 MPa and the elongation to failure δ = 2% in the 0.5 mm diameter copper wire. These contrast with σ = 556 MPa and δ = 1.4% resulted from processing without ECAH. Electrical conductivity of the highest strength wire produced with ECAH and conductivity of a hardened wire produced without ECAH differ negligibly.