Molecular dynamics simulation of tensile mechanical properties of Al<i>x</i>CoCrFeNi

Zhang Rong; Qi Wenjun; Zhang Shuang

doi:10.7513/j.issn.1004-7638.2022.06.026

Volume 43 Issue 6

Jan. 2023

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Zhang Rong, Qi Wenjun, Zhang Shuang. Molecular dynamics simulation of tensile mechanical properties of AlxCoCrFeNi[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 173-179. doi: 10.7513/j.issn.1004-7638.2022.06.026

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Zhang Rong, Qi Wenjun, Zhang Shuang. Molecular dynamics simulation of tensile mechanical properties of AlxCoCrFeNi[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 173-179. doi: 10.7513/j.issn.1004-7638.2022.06.026

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Molecular dynamics simulation of tensile mechanical properties of AlxCoCrFeNi

doi: 10.7513/j.issn.1004-7638.2022.06.026

School of Mechanical Engineering, Xinjiang University, Urumqi 830047, Xinjiang, China

Received Date: 2022-04-29
Publish Date: 2023-01-13

Abstract

Abstract

In this paper, the molecular dynamics method studied the microstructural evolution, deformation mechanism, and mechanical properties of Al_xCoCrFeNi high entropy alloy (HEAs) under uniaxial tension. The effects of Al content, high temperature, and high strain rate on the mechanical properties of Al_xCoCrFeNi at 0.1 to 1.0 molar ratio were investigated. The results show that when the molar ratio of Al is 0.1 to 1.0, the yield strain and stress at room temperature (300 K) decrease with the Al content and temperature increase. With the increase of Al content, HEAS will begin to yield at a minor strain and enter the yield stage earlier, which makes HEAS easier to deform and reduce the mechanical properties. At 300 − 1500 K, with the increase in temperature, the dislocations gradually decrease, the interaction between different dislocations is weakened, and the fixed dislocations cannot be formed, which hinders the movement of materials and leads to the decline of material strength. Al_xCoCrFeNi yield strain and yield stress are positively correlated with the change of strain rate, and the yield stress is sensitive to high strain rate.
- high entropy alloy,
- mechanical properties,
- molecular dynamics,
- uniaxial tension,
- temperature

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References(24)

References

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