Microstructure and Mechanical Properties of Co32Cr28Ni32.94Al4.06Ti3 High-Entropy Alloy

Jinquan Guo; Chaozhongzheng Tang; Huan Sheng Lai

doi:10.3390/ma15041444

Microstructure and Mechanical Properties of Co₃₂Cr₂₈Ni₃₂.₉₄Al₄.₀₆Ti₃ High-Entropy Alloy

Materials (Basel). 2022 Feb 15;15(4):1444. doi: 10.3390/ma15041444.

Authors

Jinquan Guo^{1

2}, Chaozhongzheng Tang¹, Huan Sheng Lai^{1

3}

Affiliations

¹ School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China.
² Fujian Key Laboratory of Force Measurement, Fujian Metrology Institute, Fuzhou 350108, China.
³ Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Guangzhou 510275, China.

Abstract

High-entropy alloys have good application prospects in nuclear power plants due to their excellent mechanical properties and radiation resistance. In this paper, the microstructure of the Co₃₂Cr₂₈Ni₃₂.₉₄Al₄.₀₆Ti₃ high-entropy alloy was researched using metallurgical microscopy, X-ray diffraction, and scanning electron microscopy. The mechanical properties were tested using a Vickers microhardness tester and a tensile testing machine, respectively. The results showed that Co₃₂Cr₂₈Ni₃₂.₉₄Al₄.₀₆Ti₃ had a single-phase, disordered, face-centered, cubic solid-solution structure and was strengthened by solid solution. The alloy lattice parameter and density were estimated as 0.304 nm and 7.89 g/cm³, respectively. The test results indicated that the alloy had satisfactory mechanical properties with yield stress and tensile strength of about 530 MPa and 985 MPa, respectively.

Keywords: high-entropy alloy; mechanical property; microstructure.