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Investigation of a Novel CoCrCuNiTi High Entropy Alloy on Microstructure and Mechanical Properties

  • PHYSICAL METALLURGY AND HEAT TREATMENT
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Abstract

A novel 3d transition metal high entropy alloy (3d TM HEA), CoCrCuNiTi, was exploited by Ti addition into a common 4-elemental group of CoCrCuNi. Its phase constitution, microstructure, and compressive properties in as-cast and annealed conditions were investigated. The studied alloys in both states were composed of a complex multiphase structure, including two BCC phases, one FCC phase, one cubic laves phase, and one HCP Ni3Ti phase. The two BCC phases took up around 50 vol % in total, and the other three phases occurred within the remaining regions. The majority of the BCC phases were attributed to the promising ultimate compressive strength of the studied alloys in both conditions (as-cast: 2.53 GPa, annealed: 2.22 GPa). Furthermore, an outstanding hardness of 694 HV was obtained in the as-cast alloy, implying that no strong relationship was exhibited among the hardness, phase constituent, or valence electron concentration (VEC) in the CoCrCuNi-base HEAs system.

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ACKNOWLEDGMENTS

Financial supports from the Natural Science Foundation of China (Grants no. 51801124) and Natural Science Research of Jiangsu Higher Education Institutions of China (Grants no. 18KJB430012) are gratefully acknowledge.

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Authors and Affiliations

  1. School of Mechanical Engineering, Jiangsu University of Technology, 213001, Changzhou, China

    Jiaojiao Yi & Mingqin Xu

  2. School of Materials Science and Engineering, Jiangsu University of Technology, 213001, Changzhou, China

    Lin Yang & Lu Wang

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  1. Jiaojiao Yi
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  2. Lin Yang
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  4. Lu Wang
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Correspondence to Lu Wang.

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Yi, J., Yang, L., Xu, M. et al. Investigation of a Novel CoCrCuNiTi High Entropy Alloy on Microstructure and Mechanical Properties. Russ. J. Non-ferrous Metals 62, 197–205 (2021). https://doi.org/10.3103/S1067821221020073

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