Semisolid-Liquid Fabrication of CuCr Pseudobinary Alloy by Laser-Directed Energy Deposition

Abstract

CopperChromium (CuCr) pseudobinary alloys are promising materials for electrical application. Nevertheless, their fabrication remains limited by traditional techniques, which are not suitable for manufacturing homogeneous CuCr alloys with uniformly distributed elements. Recently, semisolid-liquid manufacturing method has emerged as a promising technique route to fabricate CuCr alloys. In this work, the laser-directed energy deposition (L-DED) as one of the laser additive manufacturing (LAM) technology, was successfully introduced for semisolid-liquid fabricating the homogeneous Cu30 mass%Cr alloys. The obtained CuCr alloys are constituted by fully melted Cu metallurgically combined with semisolid-liquid Cr. The close combination of Cu and Cr is benefit to improve the electrical conductivity of the alloy. [doi:10.2320/matertrans.MT-M2022151]