Pit-to-crack transition under cyclic loading in 12% Cr steam turbine blade steel
Source abstract
Abstract
Abstract Fatigue measurements were performed up to the very high cycle fatigue regime in order to investigate pit-to-crack transition in 12% Cr steam turbine blade steel. Pre-pitted and smooth specimens were tested in air and aerated 6 ppm Cl − solution. S – N curves for different stress ratios were determined and a stress ratio dependent critical pit size for pit-to-crack transition with subsequent failure was found. Early crack initiation and small crack growth were observed in the process of development and by fractography using field emission scanning electron microscopy. Fatigue crack growth rates (FCGR) for cracks emanating from pits were determined. Good similarity of FCGR curves for short and long cracks was obtained by normalising the stress intensity factor ranges with the threshold values.
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Research context
OpenAlex topics: Fatigue and fracture mechanics · High Temperature Alloys and Creep · Material Properties and Failure Mechanisms
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References (34)
Show source-provided references
1. 1981
2. Speidel · 1984
3. Model for prediction of fatigue lives based upon a pitting corrosion fatigue process
4. Fatigue-crack initiation at corrosion pits10.1179/030716982803286403 ↗
5. Considerations of allowable stress of corrosion fatigue (focused on the influence of pitting)10.1111/j.1460-2695.1985.tb01198.x ↗
6. Prediction of fatigue crack initiation life based on pit growth10.5006/1.3577891 ↗
7. Program on Technology Innovation: Development of a Corrosion-Fatigue Prediction Methodology for Steam Turbines, Test Results of 12% Cr Blade Steel (403/410SS), in: Technical Report 1025628, EPRI, Palo Alto, CA; 2013.
8. Fatigue life estimation of pitted 12% Cr steam turbine blade steel in different environments and at different stress ratios10.1016/j.ijfatigue.2013.10.003 ↗
9. Prediction of non propagating cracks10.1016/0013-7944(79)90081-X ↗
10. Influence of environment on the fatigue crack growth behaviour of 12% Cr steel10.1016/j.ultras.2013.02.007 ↗
11. Schönbauer B, Perlega A, Tschegg S, Rieger N, Salzman R, Gandy D. Influence of corrosion pits and environment on the fatigue life of 12% Cr steam turbine blade steel. In: ICMFM-XVI, Brno; 2012. p. 25–32.
12. Corrosion fatigue process of 12 Cr stainless steel10.2355/isijinternational.30.535 ↗
13. Novel images of the evolution of stress corrosion cracks from corrosion pits10.1016/j.corsci.2011.05.050 ↗
14. Transition from pitting to fatigue crack growth – modeling of corrosion fatigue crack nucleation in a 2024-T3 aluminum alloy10.1016/S0921-5093(96)10414-7 ↗
15. Effect of pitting corrosion on fatigue crack initiation and fatigue life
16. Fatigue crack formation and growth from localized corrosion in Al–Zn–Mg–Cu10.1016/j.engfracmech.2008.11.005 ↗
17. Initiation and shape development of corrosion-nucleated fatigue cracking10.1016/j.ijfatigue.2006.10.010 ↗
18. Driving forces for localized corrosion-to-fatigue crack transition in Al–Zn–Mg–Cu10.1111/j.1460-2695.2011.01568.x ↗
19. Corrosion-fatigue prediction methodology. In: Palo Alto (CA): EPRI; 2011.
20. A new experimental method for measuring life time and crack growth of materials under multi-stage and random loadings10.1016/0041-624X(81)90017-2 ↗
21. Fatigue crack growth and threshold measurements at very high frequencies10.1179/imr.1999.44.1.1 ↗
22. Influence of mean stresses on fatigue life and damage of a turbine blade steel in the VHCF-regime10.1016/j.ijfatigue.2012.12.012 ↗
23. Ratchetting behavior of advanced 9–12% chromium ferrite steel under creep–fatigue loadings: fracture modes and dislocation patterns10.1016/j.msea.2012.01.098 ↗
24. The influence of high R ratio on unnotched fatigue behavior of 1045 steel with three different heat treatments10.1016/S0142-1123(02)00116-0 ↗
25. Corrosion fatigue of a 12%Cr low pressure turbine blade steel in simulated service environments10.1016/j.ijfatigue.2005.06.031 ↗
26. Suresh · 1998 · 256
27. The application of microstructural fracture mechanics to various metal surface states10.1098/rspa.1996.0072 ↗
28. Kitagawa H, Takahashi S. Applicability of fracture mechanics to very small cracks or the crack in the early stage. In: Second international conference on mechanical behaviour of materials, American society of metals, Boston, Ma; 1976. pp. 627–31.
29. Influence of pitting on the fatigue life of a turbine blade steel10.1046/j.1460-2695.1999.00226.x ↗
30. Corrosion–fatigue of A1N railway axle steel exposed to rainwater10.1016/j.ijfatigue.2009.08.003 ↗
31. Newman · 1979
32. Newman · 1981
33. Notched member fatigue life predictions combining crack initiation and propagation10.1111/j.1460-2695.1979.tb01349.x ↗
34. Electrochemical short crack effect in environmentally assisted cracking of a steam turbine blade steel10.1016/j.corsci.2012.01.004 ↗