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Effects of Trace La on the Aging Properties of the Cu-Ti-Zr Alloys

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Abstract

Cu-2Ti-0.3Zr and Cu-2Ti-0.3Zr-0.2La alloys were prepared by vacuum melting, and their mechanical properties and conductivity were measured after aging treatment. Both alloys were aged at 450 °C for 30 min to obtain optimum properties, and the microhardness of the Cu-Ti-Zr-La alloy increased by 8.5% and the strength by 5% compared to the Cu-Ti-Zr alloy. Characterization of the alloys by EBSD revealed that the addition of La inhibits grain growth, refines the grains and enhances the texture. The Cu4Ti phase precipitated during the Cu-Ti-Zr alloy’s aging process, and the Cu5Zr phase precipitated after La was added. It was found by analyzing the strengthening mechanisms of the Cu-Ti-Zr-La alloy that precipitation strengthening significantly contributes to the alloy strength.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (52071134), the Joint Foundation for Science and Technology Research and Development Plan of Henan Province (232103810030, 232103810031), the Program for Innovative Research Team at the University of the Henan Province (22IRTSTHN001), the China Postdoctoral Science Foundation (2023TQ0107), Key Research and Development Program of the Jiangxi Province (20224BBE52002).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Henan University of Science and Technology, Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metals New Materials and Advanced Processing Technology, Luoyang, 471023, People’s Republic of China

    Nengneng Wang, Meng Zhou, Baohong Tian, Ke Jing, Haoyan Hu, Yi Zhang & Caijiao Tian

  2. Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials, Jiangxi Academic of Sciences, Nanchang, 330096, China

    Jin Zou

  3. Medical Research Center, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, 450014, People’s Republic of China

    Qian Bai

  4. Center for Advanced Measurement Science, National Institute of Metrology, Beijing, 100029, People’s Republic of China

    Xu Li

  5. Department of Mechanical Engineering, University of South Florida, 4202 E. Fowler Ave. ENG 030, Tampa, 33620, USA

    Alex A. Volinsky

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Wang, N., Zhou, M., Tian, B. et al. Effects of Trace La on the Aging Properties of the Cu-Ti-Zr Alloys. J. of Materi Eng and Perform (2024). https://doi.org/10.1007/s11665-024-09352-3

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