Atomistic Insights into the Irradiation Resistance of Co-Free High Entropy Alloy FeMnNiCr  

作　　者：Chunhui Wang Lei Guo Rui Li() Qing Peng 

机构地区：[1]School of Mechanical Engineering,University of Science and Technology Beijing,Beijing,100083,China [2]State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beijing,100190,China [3]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing,100049,China [4]Guangdong Aerospace Research Academy,Guangzhou,511458,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2024年第10期1657-1666,共10页金属学报（英文版）

基　　金：supported by the Fundamental Research Funds for the Central Universities(No.FRF-IDRY-20-008);support provided by the National Natural Science Foundation of China(Grant No.12272378);the High-level Innovation Research Institute Program of Guangdong Province(Grant No.2020B0909010003);the LiYing Program of the Institute of Mechanics,Chinese Academy of Sciences(Grant No.E1Z1011001).

摘　　要：We have investigated the displacement cascade irradiation resistance behavior of a cobalt-free high entropy alloy FeMnNiCr using molecular dynamics simulations.The results show that defects in FeMnNiCr form in small clusters,and their migration is significantly inhibited,leading to a higher defect recombination rate and a lower number of residual defects compared to Ni.Additionally,FeMnNiCr exhibits a longer thermal peak life and lower thermal conductivity compared to Ni,providing a longer time for defect migration and combining.The migration of defect clusters in FeMnNiCr displays three-dimensional properties,attributed to its high chemical disorder.After prolonged irradiation,defects in FeMnNiCr stabilize as small clusters,whereas point defects in Ni tend to form large defect clusters and evolve into dislocations.Considering the feature of absence of the element cobalt,our results imply that FeMnNiCr has great potential in application in nuclear energies.

关 键 词：High entropy alloys Displacement cascade Irradiation defects Molecular dynamics 

分 类 号：TG139[一般工业技术—材料科学与工程]