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:Us=1.25+(5.21–0.011x)Up.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.
作者
Peng Wen
Changxing Du
Gang Tao
Guipeng Ding
闻鹏;杜长星;陶钢;丁贵鹏(School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Nanjing University of Science and Technology ZiJin College,Nanjing 210023,China;Jilin City Jmminco Industry Co.Ltd,Jilin 132021,China)
基金
Project supported by the National Natural Science Foundation of China(Grant No.11802139).
