Search academic texts

Information × Registration Number 0209U002642, 0106U004807 , R & D reports Title Investigation of physico-chemical processes of hydric environments local interaction with low-alloyed steels with take into account of their thermo sensitivity factors and stress concentration popup.stage_title Head Dmytrakh Ihor Mykolayovych, Доктор технічних наук Registration Date 11-03-2009 Organization Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine popup.description2 The tests results of pipes with model defects – stress concentrators were received under pressure of gaseous hydrogen and methane (model of natural gas). The meanings of burst pressure have been determined and significant changing of fracture mechanism of low alloyed steels in the presence of hydrogen with comparison of tests in methane was shown under hydrogen pressure up to 2.0 MPa and temperature of 200C. The relationship between fatigue crack growth rate and local hydrogen concentration at the crack tip was evaluated from experimental study. For assessment of local strength of steels at notches in presence of hydrogen the diagram “energy of local fracture – hydrogen concentration” is proposed, which can be considered as an invariant curve for a given system “material – environment” in assigned conditions of exploitation. Product Description popup.authors popup.nrat_date 2020-04-02 Close