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Information × Registration Number 0217U003528, 0116U006893 , R & D reports Title Determination of critical levels of hydrogen accumulation and the impact of hydrogen-induced microstructural changes on the degradation of physical and mechanical properties of structural materials of operating and future nuclear power plants popup.stage_title Head Tolstolutska Galyna Dmytrivna, Доктор фізико-математичних наук Registration Date 15-05-2017 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 Data on microstructure evolution as well as accumulation levels and temperature intervals of the hydrogen isotope - deuterium retention in SS316 austenitic steel have been obtained. The development of dislocation structures, vacancy and gas-filled pores is shown and the nature of their distribution by size is determined. The dependence of the amount of trapped deuterium atoms on the defect structure development upon annealing is determined. An essential hydrogen retention in the traps associated with helium and argon bubbles is established, that confirms the data obtained for stainless steels irradiated in light water reactors. The correlation of radiation-induced hardening of SS316 stainless steel and the evolution of its microstructure during irradiation in the dose range 0...25 dpa (displacement per atom) at 300 K was studied. It was found that hardening reaches 75% at such doses and saturates at 2 dpa. Defect clusters and dislocation loops with a diameter of less than 15 nm give the greatest contribution to hardening. Hydrogen affects the hardening at concentrations of ~1 at.% in the radiation defects generation environment. The effect of the initial state of EP-450 ferritic-martensitic steel on the nucleation and growth of cracks under the influence of a glow discharge hydrogen plasma is studied. It is shown that the greatest change in the surface morphology and the development of cracks occur in 95% deformed samples. The features of cracks development in EP-450 steel are analyzed. Product Description popup.authors Бикасов Костянтин Вікторович Карпов Сергій Олександрович Копанець Ігор Євгенович Луценко Валентин Дмитрович Луценко Сергій Валентинович Нікітін Аркадій Валерійович Ружицький Валерій Володимирович Толстолуцька Галина Дмитрівна popup.nrat_date 2020-04-02 Close
R & D report
Determination of critical levels of hydrogen accumulation and the impact of hydrogen-induced microstructural changes on the degradation of physical and mechanical properties of structural materials of operating and future nuclear power plants
Head: Tolstolutska Galyna Dmytrivna. Determination of critical levels of hydrogen accumulation and the impact of hydrogen-induced microstructural changes on the degradation of physical and mechanical properties of structural materials of operating and future nuclear power plants. (popup.stage: ). National Science Center "Kharkiv Institute of Physics and Technology. № 0217U003528
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Updated: 2026-03-22


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