Effect of Mn element on shock response in CoCrFeNiMn_(x) high entropy alloys  

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)

机构地区：[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

出　　处：《Chinese Physics B》2024年第11期340-348,共9页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11802139).

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.

关 键 词：high entropy alloys shock response molecular dynamics SPALLATION 

分 类 号：TG139[一般工业技术—材料科学与工程] O561[金属学及工艺—合金]