Homogeneous void nucleation in the presence of supersaturated vacancies and interstitials

作     者：Lin Shao 

作者机构：Accelerator LaboratoryDepartment of Nuclear EngineeringTexas A&M UniversityCollege StationTX77843USA 

出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)

年 卷 期：2024年第10卷第5期

页      面：1147-1159页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：The work was partially supported by Triad National Security LLC through award M2101345-01-47042-00001 

主　　题：Void nucleation Voids Irradiation Swelling Defects 

摘      要：Homogeneous void nucleation in metals containing arbitrary vacancies and interstitials has been reexamined,with corrections made to the original work by Katz and *** void size distributions derived previously missed an exponential modification function with void size as the *** a result,void nucleation under a given vacancy supersaturation ratio is underestimated by orders of *** second improvement arises from the accuracy in calculating the vacancy arrival rate to a *** present work proposes establishing a direct relationship between the vacancy arrival rate and the available self-diffusion *** these corrections and improvements,void nucleation in pure Fe is calculated as an example,and an analytic fitting formula is *** required vacancy supersaturation ratio and interstitial-to-vacancy flux ratio for void nucleation calculations can be easily obtained from an analytical solution of rate theory calculations,in which dislocation density and displacements per atom(dpa)rate are adjustable ***,the nucleation rate calculation can be incorporated into rate theory calculations considering evolving dislocation densities,which leads to time-dependent void nucleation.