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Effect of Fe Content on the Microstructure and Mechanical and Electrical Properties of Cu-Fe In Situ Composites

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Abstract

Cu-Fe in situ composites with different Fe contents were prepared by casting and cold drawing deformation. The microstructure was observed, and the mechanical and electrical properties were measured during the deformation process. The composites with a higher Fe content show a higher strength but a lower electrical conductivity because the Fe content is high enough to produce sufficient dendrite structures, resulting in strengthening and electronic scattering effects. The strain hardening of the Cu matrix mainly results in the strengthening of Cu-3 wt.% Fe. The strengthening of Cu-6 wt.% Fe is mainly attributed to the strain hardening of the Cu matrix at a lower draw ratio and the increased interface density at a higher draw ratio. A larger amount of Fe precipitates and a higher interface density lead to an improvement in the strength of Cu-12 wt.% Fe. The conductivities of the Cu-3 wt.% Fe and Cu-6 wt.% Fe alloys are similar due to the continuous Cu matrix or similar electron transmission in the Cu matrix, while that of Cu-12 wt.% Fe is much lower due to the smaller dendrite spacing and the larger amount of Fe precipitates.

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Acknowledgments

This work was supported by the Natural Science Foundation of China (Grant No. 50671092), National Key Research and Development Program of China (Grant No. 2020YFB1600100) and Science and Technology Commissioner Project of Tianjin Enterprise (Grant No. 20YDTPJC00580) and Fundamental Research Funds for the Central Universities (Grant No. 3122018C016).

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Authors and Affiliations

  1. College of Airport, Civil Aviation University of China, Tianjin, China

    Zhiwei Wu

  2. Xuzhou Jingrui Semiconductor Equipment Technology Co. Ltd, Xuzhou, China

    Yi Chen

  3. Department of Materials Science and Engineering, Zhejiang University, Hangzhou, China

    Liang Meng

  4. Big Deer Environment Protection Co. Ltd, Tianjin, China

    Zheng Zhang

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  1. Zhiwei Wu
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Wu, Z., Chen, Y., Meng, L. et al. Effect of Fe Content on the Microstructure and Mechanical and Electrical Properties of Cu-Fe In Situ Composites. J. of Materi Eng and Perform 30, 5939–5946 (2021). https://doi.org/10.1007/s11665-021-05579-6

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