Abstract
A high strength Al-Zr alloy was prepared based on a novel technique called gas-assisted continuous casting and extrusion (GAC). Results show that the solid solubility of Zr in the Al matrix could be increased due to the non-equilibrium solidification during the GAC process. After aging treatment (350 °C/275 h), the alloy has excellent combined properties (tensile strength and electrical conductivity of 200 MPa and 59.6% IACS, respectively); after cold drawing (94% deformation), the alloy can have tensile strength up to 278 MPa and good electrical conductivity (55.2% IACS). The GAC technology can fabricate aluminum alloy rod with higher solid solubility of Zr in a single-step operation, which is expected to be applied to the efficient preparation of high performance Al-Zr alloy wires.
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