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Information × Registration Number 0213U008168, 0113U000759 , R & D reports Title Development of a methodology and instruments for diagnostics of localized hydrogen damage in ferromagnetic structural elements popup.stage_title Head Skalsky Valentyn, Доктор технічних наук Registration Date 26-12-2013 Organization Karpenko Physico-Mechanical Institute of the National Academy of Science of Ukraine popup.description2 Object of investigation are the elastic waves of magneto-acoustic emission (MAE) caused by the movement of domain walls under the action of an alternating external magnetic field in hydrogenated and plastically deformed structural materials. The goal of the research is to experimentally investigate the relationships between the characteristics of the dynamic elastic displacement fields, including amplitudes of MAE signals caused by Barkhausen jumps, hydrogen concentration and other factors of degradation of ferromagnetic materials under an applied external alternating magnetic field. The methods of the research are a mathematical modeling of hydrogen diffusion from the gaseous phase in ferromagnetic solids at variable temperature and numerical calculations of magnetic induction in them, experimental measurement of amplitude values of MAE signals in hydrogenated or plastically deformed ferromagnetic materials, physical experiment. Recording and analysis of MAE signals affected by the magnetic field, mechanical and hydrogen factors make it possible to assess the development of bulk damage in ferromagnetic materials. According to the research, it is found that a low concentration of hydrogen in steels causes a growth of MAE signals amplitudes in comparison with the as-received material in air under the same condition. The higher is the concentration of hydrogen in the steel, the larger are the amplitudes of MAE signals. Product Description popup.authors Великий Петро Пилипович Гірний Святослав Ігорович Долінська Ірина Ярославівна Клим Богдан Петрович Лясота Ігор Миколайович Почапський Євген Петрович Рудавський Денис Володимирович Сергієнко Олег Миколайович Станкевич Олена Михайлівна Толопко Ярослав Дмитрович popup.nrat_date 2020-04-02 Close