|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Metal-Matrix Composites: Advances in Analysis, Measurement and Observations
||Influence of Tungsten Nanopowders on Enhancing the Aging Behavior of a Copper-chromium Alloy
||Gongcheng Yao, Shuaihang Pan, Xiaochun Li
|On-Site Speaker (Planned)
Cu-Cr alloys are a class of high-strength high-conductivity Cu alloys. However, limited by the Cu-Cr phase diagram, the strength of Cu-Cr alloys by precipitation-hardening has reached a certain limit. Suitable nanoparticles incorporating into Cu-Cr alloys, i.e. nano-treating, are expected to modify the aging behavior and further improve their properties. In this study, Cu-Cr alloy containing tungsten (W) nanoparticles was cast. The aging behavior of the nano-treated Cu-Cr and Cu-Cr counterparts is assessed. W nanoparticles accelerate the precipitation, leading to a significant reduction in the peak-aging time. Besides, the microhardness of the nano-treated Cu-Cr is increased over Cu-Cr after 45-min aging. Cold rolling can further enhance the microhardness of the nano-treated Cu-Cr. Moreover, the nano-treated sample exhibits improved thermal stability. Thus, nano-treating the Cu-Cr alloy by W nanoparticles is promising to break the limits of current Cu-Cr alloys.