Irradiation Resistance of CoCrCuFeNi High Entropy Alloy under Successive Bombardment  

作　　者：Rui Li Lei Guo Yu Liu Qingsong Xu Qing Peng 

机构地区：[1]School of Mechanical Engineering,University of Science and Technology Beijing,Beijing,100083,China [2]Physics Department,King Fahd University of Petroleum and Minerals,31261,Dhahran,Saudi Arabia [3]K.A.CARE Energy Research and Innovation Center at Dhahran,31261,Dhahran,Saudi Arabia [4]Interdisciplinary Research Center for Hydrogen and Energy Storage,King Fahd University of Petroleum and Minerals,31261,Dhahran,Saudi Arabia

出　　处：《Acta Metallurgica Sinica(English Letters)》2023年第9期1482-1492,共11页金属学报（英文版）

基　　金：The work is supported by the Fundamental Research Funds for the Central Universities(No.FRF-IDRY-20-008);Q.Peng acknowledges the support provided by the Deanship of Scientific Research(DSR)at King Fahd University of Petroleum and Minerals(KFUPM)for funding this work through project No.DF201020.

摘　　要：With the excellent irradiation resistance due to the chemical complexity,high entropy alloys have attracted considerable attention in the design of nuclear structural materials.However,their performance under successive bombardments remains elusive.In this study,we have investigated the irradiation resistance of equiatomic CoCrCuFeNi HEA compared with Ni metal using molecular dynamics simulations.The evolution of defects such as point defects,defect clusters and dislocations after 400 times of bombardments is examined.The results show that CoCrCuFeNi has fewer point defects than Ni does.Moreover,CoCrCuFeNi has smaller interstitial clusters size,lower interstitial-type Frank partial dislocation density,shorter average interstitial-type Frank partial dislocation length and higher average vacancy formation energy.These findings suggest that CoCrCuFeNi has superior radiation resistance under successive bombardments due to its high entropy effect.

关 键 词：High entropy alloys Irradiation resistance DEFECTS Dislocations 

分 类 号：TG1[金属学及工艺—金属学]