Search academic texts

Information × Registration Number 0223U005106, 0123U103425 , R & D reports Title Development of the methodology for assessing the serviceability of existing gas pipelines to improve the operational stability of the energy system of Ukraine under green hydrogen transportation popup.stage_title Head Zvirko Olha I., д.т.н. Registration Date 14-12-2023 Organization Physico-Mechanical Institute named after GV Karpenko of the National Academy of Sciences of Ukraine popup.description2  Experimental techniques have been developed for investigating the physical and mechanical properties of steels (namely, a prolonged exposure of loaded specimens to hydrogen environment and the fracture toughness evaluation for steel under hydrogen action based on non-linear fracture mechanics approaches) and electrolytic hydrogen charging modes, simulating the effect of hydrogenation on steel’s brittleness during hydrogen transportation through the gas pipeline network, have been elaborated. For the first time, the regularities of hydrogen embrittlement of gas pipeline steels in the as-received and operated states have been established based on quantitative and qualitative assessments of microstructural features, residual hydrogen content, strength and plasticity characteristics, impact strength of steels, fracture toughness, and macro- and microfracture mechanisms taking into account the steel texture, which made it possible to assess the impact of operational conditions and steels hydrogenation on changes in these characteristics. A concept of an experimental and computational method for obtaining and analysing true stress–strain diagrams of steels is developed and substantiated considering their structural and mechanical state and hydrogenation, as well as a methodology for constructing true stress–strain diagrams of pipe steels based on mechanical and metallographic studies. IPP-CENTRE LLC has approved the research results obtained during the project's first stage and considered the continuation of work reasonable. Product Description popup.authors Venhrynyuk Oleh I. Hredilʹ Myroslava I. Zvirko Olha I. Krechkovsʹka Halyna V. Nykyforchyn Hryhoriy M. Tsybailo Ivan O. Tsyrulʹnyk Oleksandr T. popup.nrat_date 2023-12-14 Close