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
Abstract The effect of Mn element on shock response of CoCrFeNiMn high entropy alloys (HEAs) are investigated using molecular dynamics simulations. Structural analysis shows that Mn-rich CoCrFeNiMn HEA has a larger average atomic volume. The elastic properties of CoCrFeNiMn 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 HEAs is obtained: -0.011. 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 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.
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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