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Information × Registration Number 0225U001033, (0121U108478) , R & D reports Title Experimental and theoretical studies of processes at the atomic level and mechanisms of changes in the structural state and physical and mechanical properties during deformation, relaxation energy actions and irradiation of structural materials promising for use in nuclear energy and other industries popup.stage_title Дослідження методами польової іонної мікроскопії та математичного моделювання радіаційно-індукованих динамічних процесів на вольфрамі та молібдені, відповідальних за поверхневий масоперенос при низькоенергетичному опроміненні іонами інертних газів. Дослідження пружних властивостей однофазних, мультіфазних й аморфних високоентропійних сплавів. Head Sokolenko Volodymyr I., Доктор фізико-математичних наук Registration Date 23-01-2025 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description1 The aim of the work is to determine the regularity and physical nature of processes and mechanisms of changes in the structural state and physical and mechanical properties of structural materials and metallic and carbon nano- and picoobjects, which are promising for use in nuclear power, nanoelectronics, mechanical engineering and other industries, under force actions (different degrees of deformation at moderately low, room and elevated temperatures), relaxation energy actions (ultrasound, non-stationary magnetic fields) and irradiation (high-energy electrons, atoms and ions of inert gases), which will contribute creating the foundations for new effective technologies for improvement their properties and resource capabilities. popup.description2 Research report: p. 34, fig. 15, tab. 2, citations of sources 42, publications 25. As a result of the irradiation of needle-shaped tungsten samples with helium atoms at an energy of 5 keB, the localization of radiation adatoms in the central part of the terraces of crystal planes {321} and the presence of zones with a zero concentration of adatoms near the atomic ladders were revealed. It was experimentally shown and confirmed by mathematical modeling that as a result of irradiation of molybdenum with low-energy helium atoms, radiation-stimulated formation of molybdenum adatoms occurs, and their movement in the surface channeling mode over significant distances (~30-40 Å) within the near-surface potential well. New fundamental data were obtained regarding the elastic and dissipative properties of high-entropy alloys in the temperature range 77-300: single-phase FeMnCoCrNi, multiphase FeMnCoCrNiV0.75 and amorphous ZrTiCuNiBe. For the first time, thermally activated processes of structural relaxation have been discovered, caused by the relaxation resonance of dislocation segments of the Bordoni and Hazigut types in crystalline alloys and atomic jumps in the potential relief of intercluster boundaries in an amorphous alloy. Keywords: tungsten, molybdenum, irradiation, field microscopy, mathematical modeling, atomic structure, high-entropy alloys, elastic and dissipative properties.  Product Description popup.authors Azarienkov Mykola O. Korniiets Anatolii V. Sadanov Yevhenii V. popup.nrat_date 2025-01-23 Close