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Evolution of microstructure and mechanical characteristics of (CrFeNiCu)100–xTix high-entropy alloys

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Abstract

(CrFeNiCu)100–xTix (x = 0, 3, 5, 7 and 10; at%) high-entropy alloys have been designed by the consideration of the thermophysical relationship between Ti and other principal elements to investigate the influence of Ti on the microstructural evolution and mechanical properties of (CrFeNiCu)100–xTix high-entropy alloys. The addition of Ti content in HEAs leads to a change in phase formation from dual-phase (FCC1 and FCC2, FCC: face-centered cubic) to the mixture of FCC1, FCC2 phases, and an additional body-centered cubic (BCC) phase. The yield strength and Vickers hardness of the alloys are enhanced from 291 to 1511 MPa and HV 134 to HV 531, respectively, which depends strongly on the volume fraction of BCC phase. On the one hand, the plasticity of the alloys reduces from 45.00% to 24.09%, but it could be considered reasonable plasticity. These results revealed that the addition of a minor alloying element in high-entropy alloys with consideration of thermophysical parameters led to the formation of a multiple solid solution structure with excellent mechanical properties.

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Acknowledgements

This work was financially supported by the National Research Foundation of Korea (NRF) grant funded by the Korean Government (Ministry of Science and ICT) (Nos. 2018R1A2B3007167 and 2021R1C1C1006279) and the Agency for Presidential Educational Institutions of the Republic of Uzbekistan (No. 3/2022).

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  1. Yusupov Dilshodbek and Sung Hwan Hong have contributed equally to this work.

Authors and Affiliations

  1. Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, 05006, Republic of Korea

    Yusupov Dilshodbek, Sung Hwang Hong, Muhammad Aoun Abbas, Gyeol Chan Kang, Hae Jin Park & Ki Buem Kim

  2. Almalyk Mountain Mining Complex(MMC), Almalyk City, 110100, Republic of Uzbekistan

    Elyorjon Jumaev

  3. School of Materials Science and Engineering, Shandong University, Jinan, 250100, China

    Wei-Min Wang

  4. Department of Chemical Engineering, New Uzbekistan University, Tashkent, 100007, Republic of Uzbekistan

    Ki Buem Kim

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Dilshodbek, Y., Hong, S.H., Abbas, M.A. et al. Evolution of microstructure and mechanical characteristics of (CrFeNiCu)100–xTix high-entropy alloys. Rare Met. 42, 3088–3098 (2023). https://doi.org/10.1007/s12598-023-02286-0

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