Microstructure Evolution, Phase Composition, Tensile and Hardness Properties Investigation of CrCuFeNi₂Ti_x-Based High-Entropy Alloys

• Autorzy: Chen Long

Identyfikatory

DOI

10.24425/amm.2023.145451

• Języki publikacji: EN

Abstrakty

EN

CrCuFeNi₂Ti_x high-entropy alloys (HEAs) (x = 0.1 ~ 0.7) are prepared and studied in this paper to investigate the effect of titanium on the microstructure, phase composition, and mechanical properties of the CrCuFeNi₂Ti_x-based system. Microstructural studies using scanning electron microscopy (SEM) and X-ray diffraction (XRD) showed that the addition of titanium could induce the formation of a body-centered cubic lattice (BCC) and intermetallic compounds (Ni₃Ti) of the CrCuFeNi₂Ti_x-based system. The practical formation of the phases meet the theory of the atomic size difference δ, mixing enthalpy ΔH_mix, mixing entropy ΔS_mix, valence electron concentration (VEC), and electronegativity difference Δχ. Additionally, the tensile and hardness properties of the CrCuFeNi₂Ti_x-based system are investigated in this study. Generally, CrCuFeNi₂Ti_x HEAs show low stiffness and good flexibility in mechanical properties. When the x value is relatively small, the HEAs show good ductility in the tensile test, which is the result of a face-centered cubic lattice (FCC) in the phase composition at this stage; when the x value becomes larger, due to the formation of the intermetallic compounds Ni₃Ti, the HEAs show high hardness.

Słowa kluczowe

EN

high entropy alloys; phase composition; microstructure; tensile tests; hardness test

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2023
• Tom: Vol. 68, iss. 3
• Strony: 881--886
• Opis fizyczny: Bibliogr. 29 poz., fot., rys., tab., wzory

Twórcy

autor

Chen Long

• Northwestern Polytechnical University, The School of Mechanical Engineering, Xi’an, China
• Shenzhen University, College of Electronics and Information Engineering, Shenzhen, China

• https://orcid.org/0000-0002-2794-2298

Bibliografia

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Uwagi

I would like to thank Prof. Sanqiang Shi, Dr. Curtis Ng, and Mr. Zhengwen Nie in the Department of Mechanical Engineering, The Hong Kong Polytechnic University for their scientific help on this project. This work was partially supported by the Fundamental Research Funds for the Central Universities (Grant No. D5000220482) and the National Natural Science Foundation of China (NSFC) (Grant No. 62101335).