Production a High-Strength and High-Conductivity Copper Wire by Using Equal-Channel Angular Hydroextrusion Method
A new approach is proposed to control the processes of billets plastic deformation during metal treatment by the methods of severe plastic deformation (SPD). High strength and plasticity have been attained for the processed copper billets after multiple repetitions of equal channel angular hydroextrusion (ECAH) and direct hydroextrusion (HE) techniques and with ECAH and HE implementation in the fractional mode. The combined SPD treatment including ECAH, HE and drawing (D) provided for fire refined tough pitch copper (Cu-FRTP) the ultimate tensile strength =686 MPa, the elongation to failure =2% and the electrical conductivity (EC) at a level of 86.4% IACS and for oxidant free copper (Cu-OF) =576 MPa, =1.9%, EC=96.7% IACS in the 0.5 mm diameter wire. Such treatment is efficient due to the alternative schemes of deformation, the fractional mode and the optimum degrees of plastic deformation and periodic creation of favorable conditions for relaxation and dynamic recrystallization processes in the material.
Jing Tao Wang, Roberto B. Figueiredo and Terence G. Langdon
O. Davydenko et al., "Production a High-Strength and High-Conductivity Copper Wire by Using Equal-Channel Angular Hydroextrusion Method", Materials Science Forum, Vols. 667-669, pp. 909-913, 2011