Corrosion fatigue crack growth emanating from notches: electrochemistry and mechanical aspects

• Autorzy: Panasyuk V. , Dmytrakh I.
• 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

Corrosion fatigue emanating from semicircular notches is considered. The studies are focused on the relationship between stress field and electrochemistry in notches with the aim of understanding and prediction of the corrosion fatigue crack nucleation and growth behaviour from notch surface. It has been done for typical corrosive active system "low strength carbon steel - 3% NaCl solution", where the electrochemical metal dissolution plays a dominant role. The semicircular notch is considered both as stress concentrator and as local corrosion minicell. The early stages of corrosion fatigue at the notch bottom were determined and the existence of some critical crack density g* that causes an intensive crack coalescence and macrocrack creation has been shown. An expression predicting the formation on notch surface the characteristic density of corrosion fatigue cracks is derived as function of the synergistic action of cyclic stress and the corrosion process.

Słowa kluczowe

EN

fatigue crack growth; corrosion; electrochemistry aspects

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2001
• Tom: z. 67
• Strony: 261--276
• Opis fizyczny: Bibliogr. 13 poz., il., schem., tab.

Twórcy

autor

Panasyuk V.

• Department of the Physical Fundamentals of Fracture and Strength of Materials, Karpenko Physico-Mechanical Institute of National Academy of Sciences of Ukraine

autor

Dmytrakh I.

• Department of the Physical Fundamentals of Fracture and Strength of Materials, Karpenko Physico-Mechanical Institute of National Academy of Sciences of Ukraine

Bibliografia

• [1] PANASYUK V.V., Fracture mechanics and strength of materials - Vol. 1-4, Naukova Dumka, Kyiv, 1988-1990, (in Russian)
• [2] PLUVINAGE G., About Notch Fracture Mechanics - Influence of local stress and strain concentrators on reliability and safety of structures, Univ. of Metz, 199G pp. 37-47
• [3] PLUVINAGE G., Fracture mechanics from notches. Physicochemical Mechanics of Materials 34 (1998 ) pp. 7-20.
• [4] DMYTRAKH I.M., PANASYUK V.V., An influence of the corrosive environments on local fracture of the metals near the stress concentrators - National Academy of Sciences of Ukraine, Karpenko Physico-Mechanical Institute, 1999, 341 ps (in Ukrainian).
• [5] PLUVINAGE G., Fatigue and fracture emanating from notch; the use of the notch stress intensity factor, Nuclear Engineering and Design. 185 (199S) pp. 173-184
• [6] QYLAFKU G., AZARI Z., KADI N., GJONAJ N., PLUVINAGE G., Application of a new model proposal for the fatigue life prediction on notches and key-scats, International Journal of Fatigue, 21 (1999) pp. 753-760
• [7] DMYTRAKH I.M., PLUVINAGE G., QYLAFKU G., On corrosion fatigue emanating from notches: stress field and electrochemistry, Physicochemical Mechanics of Materials 37 (2001)
• [8] DMYTRAKH I.M., PANASYUK V.V., YEZERSKA O.A., Identifying of Stages and Mechanisms of Electrochemical Processes Between Deformed Metal and Environment Under Corrosion Fracture of Carbon Steel - Influence of local stress and strain concentrators on reliability and safety of structures, Univ. of Miskolc Hungary 1995 pp.87-92
• [9] PANASYUK V.V., DMYTRAKH I.M.. YEZERSKA O.A., Specificity of Corrosion Processes and Cracks Initiation in Semicircular Stress Concentrators - Influence of local stress and strain concentrators on reliability and safety of structures, Univ. of Metz, 1996 pp. 117-127
• [10] AKID R., MILLER K.J., The effect of solution pH on the initiation and growth of short fatigue cracks, in Fracture bechaviour and design of materials and structures - Proc. ECF8, EMAS, 1990 pp. 1403-1411
• [11] PANASYUK V.V., DMYTRAKH I.M., YEZERSKA O.A., BILYI O.L., Corrosion fatigue cracks nucleation and growth behaviour from semicircular notches, Physicochemical Mechanics of Materials 34 (1998) pp. 53-60
• [12] AKID R., DMYTRAKH I., Influence of surface deformation and electrochemical variables on corrosion and corrosion fatigue crack development, Fatigue & Fracture of Engineering Materials & Structures 21 (1998) pp. 903-911
• [13] DMYTRAKH I.M., AKID R., MILLER K.J., Electrochemistry of deformed smooth surfaces and short corrosion fatigue crack growth behaviour, British Corrosion J. 32 (1997) pp. 138-144