SIMULATION OF INITIAL RADIATION DAMAGEABILITY
OF THE ALLOY FE–1.8 АT.%NI BY MEANS OF MOLECULAR DYNAMICS

Tikhonchev Mikhail Yuryevich, Candidate of physical and mathematical sciences, head of laboratory, Ulyanovsk State University, tikhonchev@sv.ulsu.ru
Svetukhin Vyacheslav Viktorovich, Doctor of physical and mathematical sciences, professor, director of the research technological institute under Ulyanovsk State University, slava@sv.uven.ru
Golovanov Viktor Nikolaevich, Doctor of physical and mathematical sciences, professor, vice rector for scientific affairs and information technologies, Ulyanovsk State University, golovanovvn@ulsu.ru
Kozlov Dmitry Vladimirovich, Candidate of physical and mathematical sciences, senior staff scientist, Ulyanovsk State University, kozlovdv@ulsu.ru

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The results of computer simulation of primary radiation damage processes for Fe–1.8at.%Ni alloy by means or molecular dynamics method are presented in this paper. N-body interatomic potentials were used for the simulation. Atomic displacement cascades for primary knock-out atom energy range from 0,1 to 20 keV were considered. Evaluations of numbers of point defects which survive in cascade as well as results on numbers and sizes of vacancy and interstitial clusters formed in the cascade were obtained. The noticeable influence of nickel in considered concentration on number of surviving defects is not detected. At the same time it is found out that number of interstitial forming clusters, which consist of not more than three interstitials, in pure iron is approximately half as much again than in Fe–Ni alloy.

radiation damage, Fe–Ni alloy, molecular dynamics, point defect, displacement cascade, cluster of point defects.