Aging characteristic of Cu‐0.6Cr‐0.15Zr‐0.05Mg‐0.02Si alloy containing trace rare earth yttrium

The aging characteristic of Cu‐0.6Cr‐0.15Zr‐0.05Mg‐0.02Si alloy containing trace rare earth yttrium was investigated. The results showed that Cu‐0.6Cr‐0.15Zr‐0.05Mg‐0.02Si alloy obtained good comprehensive performance after 80% rolling and then aging at 480°C for 1 h; the hardness and electrical conductivity reached HV 150 and 85.5% IACS, respectively. Increasing aging temperature accelerated aging precipitation. The time for attaining peak hardness was postponed, the precipitates were finer (2–4 nm), and the interparticle spacing was shorter due to yttrium addition. The hardness and electrical conductivity of the Y‐containing alloy after 80% deformation and then aging at 480°C for 45 min reached HV 174 and 82.1% IACS, respectively.