Effect of hydrogen degradation of structural steels on the fatigue crack growth

• Autorzy: Nykyforchyn H.
• Konferencja: Summer School Of Fracture Mechanics. Current Research On Fatigue And Fracture/sympozjum (VII ; 18-22.06.2001 ; Opole - Pokrzywna, Poland)
• Języki publikacji: EN

Abstrakty

EN

A number of effects of hydrogen both as gas and dissolved in metal on the fatigue crack growth in steels, especially at the near threshold load, has been analysed: 1) the effect of gas adsorption on the effective fatigue threshold [delta]Kth eff; 2) analysis of hydrogen effect on the fatigue crack growth in structural steels in dependence of its strength and test temperature; 3) application of fracture mechanics approaches to the evaluation of high temperature hydrogen degradation of steels; 4) use of the [delta]Kth eff parameter for evaluation of the high temperature degradation of steels during operation in hydrogen-containing environment; 5) existence of three factors of ambiguous hydrogen influence on [delta]Kth eff; 7) fractografical peculiarities of the near threshold crack growth in the degraded steel; 9) a geometric model of crack closure in the hydrogenated steel caused by fracture surface roughness and the longitudinal shear; 10) scale effect of the fatigue threshold; variance of [delta]Kth under the plane strain conditions; dependence of [delta]Kth on the specimen thickness for the hydrogenated and degraded metal.

Słowa kluczowe

EN

hydrogen degradation; structural steels; fatigue crack growth

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2001
• Tom: Vol. 269, z. 67
• Strony: 203--218
• Opis fizyczny: Bibliogr. 22 poz., il., schem., wykr.

Twórcy

autor

Nykyforchyn H.

• Department of Corrosion-Hydrogen Degradation and Material Protection Karpenko, Physico-Mechanical Institute of the National Academy of Sciences of Ukraine