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Information × Registration Number 0214U007625, 0114U000830 , R & D reports Title Development of strength and serviceability criteria of structural steel in hydrogen environment with taking into account of their hydrogenation near defects - stress concentrators popup.stage_title Head Dmytrakh Ihor, Доктор технічних наук Registration Date 25-12-2014 Organization Karpenko Physico-Mechanical Institute of the National Academy of Science of Ukraine popup.description2 Using the fracture mechanics approaches, the following criteria of strength and serviceability of structural steels in hydrogen-contained environments were proposed and grounded: threshold defects depth criterion, criterion of limitation of fatigue crack growth rate and critical defects depth criterion. For assessment of serviceability and risk of fracture of materials in hydrogen-contained environments the special diagrams were constructed, which contain three characteristic zones: safe exploitation, exploitation with predicted growth of existed defects and zone of brittle fracture risk. The engineering evaluations of safe operation of pipelines with crack-like defects in hydrogen-contained environments of different composition were made. In particular, the effect of hydrogen concentration in the bulk of metal on strength of pipelines was shown. The safe values of defect size were calculated depending on their shape and the hydrogen concentration in the bulk of metal. The received results have the direct practical applications whereas the differential evaluation of the effect of detected defects on durability of structures can be done depending on the level of material hydrogenation. Product Description popup.authors Білий Орест Левкович Барна Роман Андрійович Лещак Ростислав Любомирович Лутицький Олександер Лукич Сиротюк Андрій Михайлович popup.nrat_date 2020-04-02 Close