Study on the stress-strain behavior of CoCrFeNiCu<sub><i>x</i></sub> high-entropy alloy under biaxial tensile state

ZHANG Jiale; ZHAO Jianping; CHANG Le

doi:10.7513/j.issn.1004-7638.2025.05.009

Volume 46 Issue 5

Oct. 2025

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ZHANG Jiale, ZHAO Jianping, CHANG Le. Study on the stress-strain behavior of CoCrFeNiCux high-entropy alloy under biaxial tensile state[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(5): 85-92. doi: 10.7513/j.issn.1004-7638.2025.05.009

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ZHANG Jiale, ZHAO Jianping, CHANG Le. Study on the stress-strain behavior of CoCrFeNiCu_x high-entropy alloy under biaxial tensile state[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(5): 85-92. doi: 10.7513/j.issn.1004-7638.2025.05.009

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Study on the stress-strain behavior of CoCrFeNiCu_x high-entropy alloy under biaxial tensile state

doi: 10.7513/j.issn.1004-7638.2025.05.009

School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China

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Received Date: 2025-03-13
Accepted Date: 2025-03-25
Rev Recd Date: 2025-03-21
Publish Date: 2025-10-30

Abstract

Abstract

Using molecular dynamics (MD) simulations, the biaxial tensile behavior of CoCrFeNiCu_x (x=0.5, 1.0, 2.0, and 3.0) high-entropy alloys at different strain rates was simulated. The effects of copper content and strain rate on the biaxial tensile stress-strain behavior and the microscopic deformation mechanisms were analyzed. The results indicated that during the biaxial tensile process of CoCrFeNiCu_x high-entropy alloys, the face-centered cubic (FCC) structure and irregular atomic structure can transform into each other. As the Cu content increases, the Young's modulus, yield strength, and ultimate tensile strength of CoCrFeNiCu_x high-entropy alloys decrease, while an increase in strain rate enhances their ultimate tensile strength and fracture strain. Compared to the uniaxial tension, the stress-strain behavior under both stress states exhibits the strain hardening and strain rate strengthening effects. However, under biaxial loading, the yield strength increases, while the ultimate tensile strength and failure strain significantly decrease. This study provides important reference value for the design and preparation of this alloy.
- high-entropy alloy,
- biaxial tension,
- molecular dynamics,
- mechanical properties

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References(27)

References

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