Mechanical Properties of AlCrFeCuNi High Entropy Alloy: A Molecular Dynamics Study

LI Jian; GUO Xiaoxuan; MA Shengguo; LI Zhiqiang; XIN Hao

doi:10.11858/gywlxb.20190762

Volume 34 Issue 1

Jan 2020

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Chinese Journal of High Pressure Physics > 2020 > 34(1): 011301.

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LI Jian, GUO Xiaoxuan, MA Shengguo, LI Zhiqiang, XIN Hao. Mechanical Properties of AlCrFeCuNi High Entropy Alloy: A Molecular Dynamics Study[J]. Chinese Journal of High Pressure Physics, 2020, 34(1): 011301. doi: 10.11858/gywlxb.20190762

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Mechanical Properties of AlCrFeCuNi High Entropy Alloy: A Molecular Dynamics Study

doi: 10.11858/gywlxb.20190762

LI Jian^{1, 2
,},
GUO Xiaoxuan^{1, 2},
MA Shengguo^{1, 2},
LI Zhiqiang^{1, 2},
XIN Hao^{1, 2,*
,
,}

1.
Institute of Applied Mechanics, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
2.
Shanxi Key Laboratory of Material Strength and Structural Impact, College of Mechanics, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

Received Date: 18 Apr 2019
Rev Recd Date: 09 May 2019

Abstract

Abstract

High entropy alloy (HEA) has high strength, high hardness, high wear resistance and corrosion resistance which traditional alloys do not have, and has broad application prospects. The mechanical properties of AlCrFeCuNi high Entropy Alloy (HEA) under axial loading were also studied in this paper. Molecular dynamics method was used to simulate the experimental preparation process of HEA and establish an atomic model. The mechanical properties of AlCrFeCuNi HEA at different temperatures and Al concentrations were studied. The deformation process and the reasons for its high plasticity were analyzed from the point of view of material science. The simulation results show that the AlCrFeCuNi HEA undergoes elastic deformation, yield and plastic deformation stages under tension loads. In the yield stage, the appearance and growth of twins and stacking faults are one of the main reasons for the uneven plastic deformation of the alloy. The analysis shows that the Young’s modulus and yield stress of the HEA decrease linearly with the increase of Al concentration. The HEA have strong temperature effect. The lower the temperature, the smaller the Al concentration, and the greater the decrease in Young’s modulus and yield stress.
- high entropy alloy (HEA),
- molecular dynamics,
- tensile mechanical property,
- temperature effect,
- aluminum concentration

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References

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Mechanical Properties of AlCrFeCuNi High Entropy Alloy: A Molecular Dynamics Study

doi: 10.11858/gywlxb.20190762

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Mechanical Properties of AlCrFeCuNi High Entropy Alloy: A Molecular Dynamics Study

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