Study on size-dependence of tensile mechanical properties and plastic deformation mechanism in CoCrFeNiMn high entropy alloy

An Minrong; Yao Junfan; Chen Xuan; Wang Bo; Lü Jiangyi; Zhu Zhihao; Quan Kai; Li Teng

doi:10.7513/j.issn.1004-7638.2023.06.025

Volume 44 Issue 6

Dec. 2023

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An Minrong, Yao Junfan, Chen Xuan, Wang Bo, Lü Jiangyi, Zhu Zhihao, Quan Kai, Li Teng. Study on size-dependence of tensile mechanical properties and plastic deformation mechanism in CoCrFeNiMn high entropy alloy[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(6): 179-185. doi: 10.7513/j.issn.1004-7638.2023.06.025

Citation:

An Minrong, Yao Junfan, Chen Xuan, Wang Bo, Lü Jiangyi, Zhu Zhihao, Quan Kai, Li Teng. Study on size-dependence of tensile mechanical properties and plastic deformation mechanism in CoCrFeNiMn high entropy alloy[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(6): 179-185. doi: 10.7513/j.issn.1004-7638.2023.06.025

Citation:

An Minrong, Yao Junfan, Chen Xuan, Wang Bo, Lü Jiangyi, Zhu Zhihao, Quan Kai, Li Teng. Study on size-dependence of tensile mechanical properties and plastic deformation mechanism in CoCrFeNiMn high entropy alloy[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(6): 179-185. doi: 10.7513/j.issn.1004-7638.2023.06.025

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Study on size-dependence of tensile mechanical properties and plastic deformation mechanism in CoCrFeNiMn high entropy alloy

doi: 10.7513/j.issn.1004-7638.2023.06.025

1.
College of New Energy, Xi’an Shiyou University, Xi’an 710065, Shaanxi, China
2.
The Eleventh Exploit Factory of Petro China Changqing Oilfield Company, Xi’an 710016, Shaanxi, China

Received Date: 2022-10-27
Available Online: 2024-01-11
Publish Date: 2023-12-30

Abstract

Abstract

The mechanical properties of CoCrFeNiMn high entropy alloys (HEAs) with different cross section sizes were investigated by molecular dynamics simulation under tensile loading. Modified embedding atomic potential was employed to describe the interactions between Co, Cr, Fe, Ni and Mn atoms. The simulation results indicated that the tensile properties and deformation mechanism of CoCrFeNiMn HEAs depended on the cross section size. A critical value of peak stress occurred when the cross section size was 7.00 nm, which depended on the number of dislocation nucleation sites. With the increase of cross section size, the plastic deformation mechanism changed from the formation of amorphous structures to dislocation slip and transformation from FCC structure to HCP structure. The results of this study can provide a guidance for design and preparation of high entropy alloy with high performance.
- high entropy alloy,
- mechanical behavior,
- size effect,
- deformation mechanism

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References(31)

References

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