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Information × Registration Number 0308U003996, 0106U011938 , R & D reports Title Development of advanced methods and means for expert assessment of strength and durability of materials and structural elements of pipelines systems for transportation of gaseous hydrogen and its admixtures with taking into account of operational conditions popup.stage_title Розробка та апробація нових методів визначення характеристик тріщиностійкості металів за дії газоподібного водню та інших воденьвмісних середовищ, а також встановлення умов та критеріїв зародження поверхневих дефектів та пошкоджень у деформованому матеріалі під дією воденьвмісного середовища Head Dmytrakh Ihor Mykolayovych, Доктор технічних наук Registration Date 20-08-2008 Organization Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine popup.description2 Method for assessment of hydrogen degradation of structural steels is developed on the base of fracture mechanics approaches with using of conception of threshold stress intensity factor. The conditions and specificity of surface damaging of low-alloyed pipeline steels under joint action of hydrogenating environment and cyclic loading were experimentally determined and the analytic-experimental criterion of surface cracking was developed. For local strength assessment of steels at the surface's defects, the diagram "energy of local fracture - hydrogen concentration" was proposed, which can be considered as invariant curve for given system "material-environment". Product Description popup.authors popup.nrat_date 2020-04-02 Close