Abstract
Cu–36 wt% Zn alloy is widely used in valves of water and heating and auto parts, etc. Nevertheless, the structure is still coarse, and performances are much poor. The structure and performances of Cu–36 wt% Zn alloy were investigated by adding Al2O3 nanoparticles and stirring. Results indicate that by Al2O3 nanoparticles coupling electromagnetic stirring, the Cu–36 wt% Zn alloy with refined microstructure was successfully prepared. The average grain size is refined by 99 % compared with that without nanoparticles and stirring. The tensile strength (Rm) and percentage elongation after fracture (A11.3) increase by 20.58 % and 19.40 %, respectively, compared with that without nanoparticles and stirring. Nanoparticles increase heterogeneous nucleation rate by 50 % compared with that without nanoparticles. The depth of dezincification layer decreases by 78.71 % compared with that without nanoparticles and stirring, as protective layer (Cu–Al2O3–Zn) is completely formed around the grain boundaries.
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Acknowledgments
This study was financially supported by the National Natural Science Foundation of China (No. 51571160), the Fundamental Research Fund for Taizhou Science and Technology (No. 131KY02), the Public Welfare Projects of Science and Technology Department of Zhejiang Province (No. 2015C31143), and the Pivot Innovation Team of Shaanxi Electric Materials and Infiltration Technique (No. 15JS071).
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Fu, YB., Lu, YP., Wang, ZJ. et al. Microstructural refinement and performance improvement of Cu–36 wt% Zn alloy by Al2O3 nanoparticles coupling electromagnetic stirring. Rare Met. 41, 3560–3565 (2022). https://doi.org/10.1007/s12598-016-0723-6
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DOI: https://doi.org/10.1007/s12598-016-0723-6