Effect of Ti content on microstructure and mechanical properties of CuCoFeNi high-entropy alloys

Xi-cong Ye; Tong Wang; Zhang-yang Xu; Chang Liu; Hai-hua Wu; Guang-wei Zhao; Dong Fang

doi:10.1007/s12613-020-2024-1

Volume 27 Issue 10

Oct. 2020

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2020 > 27(10): 1326-1331

Xi-cong Ye, Tong Wang, Zhang-yang Xu, Chang Liu, Hai-hua Wu, Guang-wei Zhao, and Dong Fang, Effect of Ti content on microstructure and mechanical properties of CuCoFeNi high-entropy alloys, Int. J. Miner. Metall. Mater., 27(2020), No. 10, pp. 1326-1331. https://doi.org/10.1007/s12613-020-2024-1

Cite this article as:

Xi-cong Ye, Tong Wang, Zhang-yang Xu, Chang Liu, Hai-hua Wu, Guang-wei Zhao, and Dong Fang, Effect of Ti content on microstructure and mechanical properties of CuCoFeNi high-entropy alloys, Int. J. Miner. Metall. Mater., 27(2020), No. 10, pp. 1326-1331. https://doi.org/10.1007/s12613-020-2024-1

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Research Article

Effect of Ti content on microstructure and mechanical properties of CuCoFeNi high-entropy alloys

+ Author Affiliations

Corresponding authors:
Xi-cong Ye E-mail: yexc@ctgu.edu.cn

Dong Fang E-mail: hill988@163.com
Received: 6 December 2019; Revised: 16 February 2020; Accepted: 17 February 2020; Available online: 20 February 2020

Abstract

Abstract

We prepared (CuCoFeNi)Ti_x (x = 0, 0.2, 0.4, 0.6, 0.8, and 1.0) high-entropy alloys (HEAs) by vacuum arc melting and then investigated the effects of Ti on their microstructure and mechanical properties. When x was inreased to 0.6, the structure of the alloy transformed from their initial single face-centered cubic (fcc) structure into fcc+Laves mixed structure. The Laves phase was found to comprise Fe₂Ti and be mainly distributed in the dendrite region. With increasing Ti content, both the Laves phase and the hardness of the alloy increased, whereas its yield and fracture strengths first increased and then decreased, reaching their highest value when x was 0.8. The (CuCoFeNi)Ti_0.8 alloy exhibited the best overall mechanical properties, with yield and fracture strengths of 949.7 and 1723.4 MPa, respectively, a fracture strain of 27.92%, and a hardness of HV 461.6.
- high-entropy alloys;
- microstructure;
- compression performance;
- Vickers hardness

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