
Динамика 2-краудиона и перенос энергии в вольфраме: атомистическое моделирование = Dynamics of 2-crowdion and energy transfer in tungsten: atomistic modeling
Статья в журнале
Русский
538.9
10.25587/2222-5404-2024-21-4-73-80
вольфрам; дефекты кристаллической решетки; вакансия; дислокация; краудионы; перенос энергии; нелинейная динамика; потенциал взаимодействия; метод молекулярной динамики; моделирование; tungsten; crystal lattice defects; vacancy; dislocation; crowdions; energy transfer; nonlinear dynamics; interaction potential; molecular dynamics method; modeling
The migration of point defects in metals contributes to the transfer of mass and energy during plastic deformation, heat treatment, irradiation, etc. In this regard, the study of such physical processes of nonlinear dynamics of the crystal lattice of metals is an urgent task. In this paper, the dynamics of 2-crowdion and the processes of energy transfer in tungsten are studied, aimed at understanding the mechanisms of defect formation and energy dissipation under extreme temperatures and pressures. It is known that crystal lattices accumulate a large number of defects under external influence, such as vacancies, dislocations, and grain boundaries. All these defects create internal stress fields that will affect the dynamics of crowdions. Using the methods of molecular dynamic modeling and embedded atom model, the propagation of 2-crowdions in a three-dimensional structure was studied. The main results show that the formation of 2-crowdions occurs at critical values of the excitation energy and depends on the initial configuration of the system, where 2-crowdions initiate chain processes of energy transfer through the atomic lattice. It is revealed that the depth of passage of the 2-crowdion linearly depends on the magnitude of the initial energy. The obtained spatiotemporal characteristics of the energy distribution demonstrate the role of 2-crowdions in the local concentration of energy and its subsequent transfer through atomic bonds, which leads to the formation of point defects. These results are important for the design of new radiation-resistant materials, as they help predict the material’s resistance to high-energy influences. The work contributes to the understanding of the physical foundations of energy dissipation and the behavior of defects in refractory materials used in thermonuclear fusion and other high-temperature processes.
Динамика 2-краудиона и перенос энергии в вольфраме: атомистическое моделирование / Ю. Р. Шарапова, А. М. Казаков, М. Н. Семёнова [и др.] ; Уфимский университет науки и технологий, Политехнический институт (филиал) СВФУ, Институт проблем сверхпластичности металлов РАН // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. - 2024. - Т. 21, N 4 (98). - С. 73-80. - DOI: 10.25587/2222-5404-2024-21-4-73-80
DOI: 10.25587/2222-5404-2024-21-4-73-80
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