Effect of Zr and Sc on mechanical properties and electrical conductivities of Al wires
(1. School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China;
2. School of Transportation and Mechanical Engineering, Shenyang Jianzhu University, Shenyang 110168, China)
2. School of Transportation and Mechanical Engineering, Shenyang Jianzhu University, Shenyang 110168, China)
Abstract: In order to obtain the Al wires with good mechanical properties and high electrical conductivities, conductive wires of Al-0.16Zr, Al-0.16Sc, Al-0.12Sc-0.04Zr (mass fraction, %) and pure Al (99.996%) were produced with the diameter of 9.5 mm by continuous rheo-extrusion technology, and the extruded materials were heat treated and analyzed. The results show that the separate additions of 0.16% Sc and 0.16% Zr to pure Al improve the ultimate tensile strength but reduce the electrical conductivity, and the similar trend is found in the Al-0.12Sc-0.04Zr alloy. After the subsequent heat treatment, the wire with the optimum comprehensive properties is Al-0.12Sc-0.04Zr alloy, of which the ultimate tensile strength and electrical conductivity reach 160 MPa and 64.03% (IACS), respectively.
Key words: alloy composition; Al wires; mechanical properties; electrical conductivity; continuous rheo-extrusion