Manufacturing Technology 2023, 23(3):326-332 | DOI: 10.21062/mft.2023.041

Effect of High Temperature Heat Treatment on the Structure and Properties of FeCoCrNiZr Alloy

Jiasheng Shen ORCID...1, Sheng Lei ORCID...1,2, Jigen Fang ORCID...1, Yafeng Liu ORCID...1, Zhengqiang Hu ORCID...1, Shaojie Cui ORCID...1, Hailang Zhang ORCID...1, Zhengwei Xue ORCID...1
1 School of Mechanical and Electrical Engineering, Anhui Jianzhu University, Hefei 230601, China
2 Key Laboratory of Intelligent Manufacturing of Construction Machinery, Hefei 230601, China

FeCoCrNiZr high-entropy alloy was melted by vacuum arc melting. The alloys were vacuum annealed at 873, 1073, and 1273K, respectively. The microstructure, compressive mechanical properties, thermal stability, and hardness of as-cast and annealed FeCoCrNiZr alloys at different annealing temperatures were investigated by using X-ray diffractometry (XRD), scanning electron microscopy (SEM), microhardness tester and universal material testing machine. The results reveal that it has no noticeable change in the phase composition of the alloy after high temperature annealing. The as-cast FeCoCrNiZr alloy is composed of the body-centred cubic phase and Laves phase. In the 1073K annealed state, the σ phase was detected in the alloy, and the alloy's hardness reached a maximum value of 915.94 HV0.2. The hardness of the alloy in the annealed state is obviously higher than that of the as-cast alloy, and the increased compressive strength is the result of the combined effect of the hardening of the C15 Laves phase and the solid solution strengthening of the Zr atoms.

Keywords: High-entropy alloy, Annealing, Microstructure, Compressive properties, Microhardness
Grants and funding:

This work has been supported by the Natural Science Foundation of the Higher Education Institutions of Anhui Province under Grant No. KJ2020ZD42

Received: January 11, 2023; Revised: June 13, 2023; Accepted: June 14, 2023; Prepublished online: June 15, 2023; Published: July 5, 2023  Show citation

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Shen J, Lei S, Fang J, Liu Y, Hu Z, Cui S, et al.. Effect of High Temperature Heat Treatment on the Structure and Properties of FeCoCrNiZr Alloy. Manufacturing Technology. 2023;23(3):326-332. doi: 10.21062/mft.2023.041.
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