中国物理B ›› 2024, Vol. 33 ›› Issue (11): 116103-116103.doi: 10.1088/1674-1056/ad7fd0

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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. 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
  • 收稿日期:2024-07-01 修回日期:2024-08-19 接受日期:2024-09-26 出版日期:2024-11-15 发布日期:2024-11-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11802139).

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. 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
  • Received:2024-07-01 Revised:2024-08-19 Accepted:2024-09-26 Online:2024-11-15 Published:2024-11-15
  • Contact: Peng Wen E-mail:wenpeng@njust.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11802139).

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摘要： 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.

关键词: high entropy alloys, shock response, molecular dynamics, spallation

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.

Key words: high entropy alloys, shock response, molecular dynamics, spallation

中图分类号:  (Alloys )

  • 61.66.Dk
62.50.Ef (Shock wave effects in solids and liquids) 02.70.Ns (Molecular dynamics and particle methods) 81.40.Np (Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure)