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Information × Registration Number 0222U000588, 0121U108779 , R & D reports Title The investigation of the structural state influence on the microstructural evolution optimization and increase of structural materials radiation resistance of the modern and future nuclear energy popup.stage_title Head Voievodin Viktor M., Доктор фізико-математичних наук Registration Date 13-01-2022 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2 Under the conditions of simulated irradiation with heavy gas ions (Ar and Kr) by transmission electron microscopy, the influence of structural-phase state on radiation resistance of T91 steel was studied and the role of segregations on gas porosity development in X18H10T and X18H10T DUO steels was considered. It is shown that after irradiation with krypton ions ordinary martensitic steel T91 swells quite uniformly, while the submicron ferritic-martensitic structure of T91 steel, obtained as a result of intense plastic deformation, swells unevenly. At the same time, the total amount of swelling decreases. Gas swelling depends mainly on the grain size and to a lesser extent on the structural-phase state of the material. The methods of HRTEM, FFT, Fourier mask filtration and inverse FFT (IFFT) filtration were used to investigate the structure and orientation of TiC precipitates in the Х18H10T austenitic stainless steel matrix and to understand the role (influence) of precipitates in the behavior of gas bubbles at irradiation with argon ions. The size of the precipitate was found to be critical. The coherence of TiC is maintained at the interface when the precipitate is in its formation stage. Growth of precipitates can lead to loss of coherence when the size of the precipitate in austenitic steel exceeds 10 nm. During argon irradiation, a large positive difference between the precipitate compared to the matrix leads to the formation of a thin and concentrated dispersion (spread) of bubbles at the interface between the precipitate - matrix or near it. Product Description popup.authors Kalchenko Oleksandr S. Rostova Hanna Yu. Tolstolutska Galyna D. popup.nrat_date 2022-03-09 Close