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Effect of Mn element on shock response in CoCrFeNiMnx high entropy alloys |
| Peng Wen(闻鹏)1,†, Changxing Du(杜长星)2, Gang Tao(陶钢)1, and Guipeng Ding(丁贵鹏)3 |
1 School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2 Nanjing University of Science and Technology ZiJin College, Nanjing 210023, China;
3 Jilin City Jmminco Industry Co. Ltd, Jilin 132021, China |
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Abstract The effect of Mn element on shock response of CoCrFeNiMn$_{x}$ high entropy alloys (HEAs) are investigated using molecular dynamics simulations. Structural analysis shows that Mn-rich CoCrFeNiMn$_{x}$ HEA has a larger average atomic volume. The elastic properties of CoCrFeNiMn$_{x}$ HEAs under various hydrostatic pressures are studied, revealing that the elastic modulus decreases with increasing of Mn content. The shock thermodynamic parameters are quantitatively analyzed. The Mn-dependent shock Hugoniot relationship of CoCrFeNiMn$_{x}$ HEAs is obtained: $ U_{\rm s} = 1.25 + (5.21$-0.011$x)U_{\rm p}$. At relatively high shock pressure, the increase in Mn content promotes the formation of clustered BCC structures and hinders the development of dislocations. In addition, more FCC structures in Mn-rich CoCrFeNiMn$_{x}$ HEAs transform into disordered structures during spallation. Spall strength decreases with increasing Mn content. This study can provide a reference for the design and application of CoCrFeNiMn HEAs under shock loading.
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Received: 01 July 2024
Revised: 19 August 2024
Accepted manuscript online: 26 September 2024
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PACS:
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61.66.Dk
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(Alloys )
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62.50.Ef
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(Shock wave effects in solids and liquids)
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02.70.Ns
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(Molecular dynamics and particle methods)
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81.40.Np
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(Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11802139). |
Corresponding Authors:
Peng Wen
E-mail: wenpeng@njust.edu.cn
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Cite this article:
Peng Wen(闻鹏), Changxing Du(杜长星), Gang Tao(陶钢), and Guipeng Ding(丁贵鹏) Effect of Mn element on shock response in CoCrFeNiMnx high entropy alloys 2024 Chin. Phys. B 33 116103
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