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Registration Number

0215U004292, 0111U006666 , R & D reports

Title

Development of basic research on the nature and regularities of formation of hydrogen-induced cracks in welded joints of structural steels, for storage and transportation of hydrogen

Head

Pokhodnya Igor Konstantinovich,

Registration Date

20-02-2015

Organization

E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine

Description

Promising material for high-pressure tanks for hydrogen storage is high strength structural steels. Manufacture of tanks using arc welding is difficult because of the possibility of formation of hydrogen induced cold cracking (HICC) in welds. Therefore, when making these capacities the risk of HICC should be evaluated in welded joints based on the hydrogen embrittlement mechanism in welding specifics. For this reason the micromechanical model of the metal destruction was developed based on the phenomenological theory of dislocation. Plastic deformation of the metal leads to the accumulation of microdefects that with further increase leads to failure at the macro level. However, the influence of the stress-strain state on the evolution of microdefects is taken into account as the influence of microdefects on the stress-strain state, that is model is self-consistent. The model takes into account the influence of hydrogen which is "on dislocations" in the nucleation and growth of microdefects that lead to the destruction of the metal. On the basis of the model equations modeling of thermomechanical welding processes was conducted and compared with experiment.

Product Description

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Єрмоленко Дмитро Юрійович
Ігнатенко Олексій Вікторович
Варивода Микола Олексійович
Власенко Валерій Сергійович
Войнарович Сергій Григорович
Галіч Павло Іванович
Губеня Ігор Петрович
Жуков Віктор Вікторович
Пальцевич Андрій Петрович
Писаренко Вячеслав Петрович
Савицький Віктор Володимирович
Синюк Володимир Сергійович
Степанюк Сергій Миколайович