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Information × Registration Number 0224U033214, (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 Дослідження впливу структурного стану на зміцнення конструкційних матеріалів ядерної енергетики. Head Voievodin Viktor M., Доктор фізико-математичних наук Registration Date 21-12-2024 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description1 The purpose of research on the topic is to create a scientific basis for a successful practical solution to a number of problematic materials science issues on the mechanisms of radiation damage to nuclear materials due to radiation-induced evolution of microstructure and micro-composite composition for reaching the cost-effectivity and the safe operation of nuclear reactors popup.description2 Within the framework of the stage, advanced austenitic and ferritic-martensitic steels, high-entropy and multicomponent alloys were studied. Ion irradiation in combination with nanoindentation was used to study these materials, analyzing both experimental data and theoretical approaches to elucidate the mechanisms underlying radiation-induced hardening. The dependence of the hardening parameters on the irradiation dose was analyzed and the correlation between these parameters and the microstructural evolution was studied. It was found that dislocation loops and gas-filled nanoscale bubbles are the main factors contributing to radiation hardening. It is shown that the developed alloys have a reduced susceptibility to radiation-induced hardening compared to traditional stainless steels SS316 and Х18Н10Т. The mechanisms that can influence the behavior of radiation hardening/embrittlement of the studied materials are discussed. The alloys with the OCC structure showed 50% less hardening than the austenitic reference steels, which is due to more efficient recombination of defects and higher self-diffusion coefficients compared to the alloys with the HCC structure.  Product Description popup.authors Karpov Serhii O. Tolstolutska Halyna D. popup.nrat_date 2024-12-21 Close