Effect of Trace Yttrium on Properties and Microstructure of Cu-0.6Cr-0.15Zr-0.05Mg-0.02Si Alloy
Effect of rare earth yttrium on the properties and microstructure of Cu-0.6Cr-0.15Zr-0.05Mg-0.02Si alloy was investigated. The results showed that Cu-0.6Cr-0.15Zr-0.05Mg-0.02Si alloy obtained good comprehensive performance after 80% deformation and then aging at 480°C for 1h, the hardness and electrical conductivity reached 152HV and 85.5%IACS, respectively. The aging time of Y-containing alloy for attaining peak hardness was postponed and the precipitates were finer (2-4nm) and interparticle spacing was shorter than ones of Y-free alloy. The hardness and electrical conductivity of the Y-containing alloy after 80% deformation and then aging at 480°C for 45 min reached 174HV and 82.1%IACS, respectively. The tensile fractures of the two alloys which exhibits the obvious feature of tough fracture.
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
J. Y. Cheng et al., "Effect of Trace Yttrium on Properties and Microstructure of Cu-0.6Cr-0.15Zr-0.05Mg-0.02Si Alloy", Advanced Materials Research, Vols. 239-242, pp. 338-342, 2011