Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 31, No. 10 (October 2018) 1773-1781   

downloaded Downloaded: 58   viewed Viewed: 493

  PROBABILITY APPROACH FOR PREDICTION OF PITTING CORROSION FATIGUE LIFE OF CUSTOM 450 STEEL
 
A. Salarvand, E. Poursaeidi and A. Azizpour
 
( Received: November 10, 2017 – Accepted in Revised Form: August 17, 2018 )
 
 

Abstract    In this study, the pitting type of corrosion growth characteristics, fatigue crack initiation and propagation behavior; axial fatigue tests were carried out on precipitation hardened martensitic Custom 450 steel in the air and 3.5wt% NaCl solution. Using the ratio of the depth to the half-width of the pits; (a/c)= 1.5±0.2 the corrosion pit depth growth law was obtained as a function of stress amplitude and elapsed time, t. Fatigue crack growth rates were determined in the near threshold stress intensity factors regime (∆kth). A model was presented for estimation of corrosion fatigue life based on the time to reach critical pit depth (as crack initiation) and crack propagation life. Then. S-N curves were obtained both in air and NaCl solution from axial fatigue testing. Comparison of data from the proposed model and the experimental results (S-N curves) showed good agreement.

 

Keywords    Corrosion Fatigue, Corrosion Pit, Crack Propagation, High Cycle Fatigue, Custom 450 Steel

 

چکیده   

در این مطالعه، جهت ارزیابی مشخصات رشد حفره خوردگی، شروع ترک خستگی و رفتار رشد، آزمون¬های خستگی محوری بر روی فولاد مارتنزیتی رسوب سختی شده Custom 450 در هوا و محلول 5/3 درصد NaCl انجام شد. با در نظر گرفتن نسبت عمق به نصف عرض حفره¬ها بصورت ، قانون رشد عمق حفره خوردگی به عنوان تابعی از دامنه تنش σa و زمان سپری شده t تخمین زده شد. نرخ¬های رشد ترک خستگی در نواحی نزدیک فاکتور شدت تنش آستانه تعیین شدند و مدلی برای تخمین عمر خستگی خوردگی بر اساس زمان رسیدن به عمق بحرانی حفره و عمر رشد ترک ارائه شد. سپس منحنی¬های S-N از آزمایش¬های خستگی محوری در هوا و محلول NaCl بدست آمدند که مقایسه داده¬های مدل پیشنهادی با نتایج آزمایشگاهی (منحنی¬های S-N) توافق خوبی را نشان داد.

References   

1. Poursaeidi, E., Sanaieei, M., and Bakhtyari, H., “Life Estimate of a Compressor Blade through Fractography”, International Journal of Engineering - Transactions A: Basics, Vol. 26, No. 4, (2012), 393–400.
2. Poursaeidi, E., Babaei, A., Behrouzshad, F., and Mohammadi Arhani, M.R., “Failure analysis of an axial compressor first row rotating blades”, Engineering Failure Analysis, Vol. 28, (2013), 25–33.
3. Poursaeidi, E., and Pedram, O., “An Outrun Competition of Corrosion Fatigue and Stress Corrosion Cracking on Crack Initiation in a Compressor Blade”, International Journal of Engineering - Transactions B: Applications, Vol. 27, No. 5, (2013), 785–792.
4. Lindley, T.C., Mcintyre, P., and Trant, P.J., “Fatigue-crack initiation at corrosion pits”, Metals Technology, Vol. 9, No. 1, (1982), 135–142.
5. Kondo, Y., “Prediction of fatigue crack initation life based on pit growth”, Corrosion, Vol. 45, No. 1, (1989), 7–11.
6. Kawai, S., and Kasai, K., “Considerations of Allowable Stress of Corrosion Fatigue (Focussed on the Influence of Pitting)”, Fatigue & Fracture of Engineering Materials & Structures, Vol. 8, No. 2, (1985), 115–127.
7. Turnbull, A., McCartney, L.N., and Zhou, S., “A model to predict the evolution of pitting corrosion and the pit-to-crack transition incorporating statistically distributed input parameters”, Corrosion Science, Vol. 48, No. 8, (2006), 2084–2105.
8. Sriraman, M.R., and Pidaparti, R.M., “Crack Initiation Life of Materials Under Combined Pitting Corrosion and Cyclic Loading”, Journal of Materials Engineering and Performance, Vol. 19, No. 1, (2010), 7–12.
9. Cavanaugh, M., Buchheit, R., and Birbilis, N., “Modeling the environmental dependence of pit growth using neural network approaches”, Corrosion Science, Vol. 52, No. 9, (2010), 3070–3077.
10. Sriraman, M.R., and Pidaparti, R.M., “Life Prediction of Aircraft Aluminum Subjected to Pitting Corrosion Under Fatigue Conditions”, Journal of Aircraft, Vol. 46, No. 4, (2009), 1253–1259.
11. Ishihara, S., Saka, S., Nan, Z.Y., Goshima, T., and Sunada, S., “Prediction of Corrosion Fatigue Lives of Aluminium Alloy on The Basis of Corrosion Pit Growth Law”, Fatigue and Fracture of Engineering Materials and Structures, Vol. 29, No. 6, (2006), 472–480.
12. Shi Pan, M.S., “Damage tolerance approach for probabilistic pitting corrosion fatigue life prediction”, Engineering Fracture Mechanics, Vol. 68, No. 13, (2001), 1493–1507.
13. Bastidas-Arteaga, E., Bressolette, P., Chateauneuf, A., and Sánchez-Silva, M., “Probabilistic lifetime assessment of RC structures under coupled corrosion–fatigue deterioration processes”, Structural Safety, Vol. 31, No. 1, (2009), 84–96.
14. Lin, C.K., and Tsai, W.J., “Corrosion fatigue behaviour of a 15Cr-6Ni precipitation-hardening stainless steel in different tempers”, Fatigue and Fracture of Engineering Materials and Structures, Vol. 23, No. 6, (2000), 489–497.
15. Schonbauer, B.M., Stanzl-Tschegg, S.E., Perlega, A., Salzman, R.N., Rieger, N.F., Zhou, S., Turnbull, A., and Gandy, D., “Fatigue life estimation of pitted 12% Cr steam turbine blade steel in different environments and at different stress ratios”, International Journal of Fatigue, Vol. 65, (2014), 33–43.
16. Schonbauer, B.M., Perlega, A., Karr, U.P., Gandy, D., and Stanzl-Tschegg, S.E., “Pit-to-crack transition under cyclic loading in 12% Cr steam turbine blade steel”, International Journal of Fatigue, Vol. 76, (2015), 19–32.
17. El Haddad, M.H., Topper, T.H., and Smith, K.N., “Prediction of non propagating cracks”, Engineering Fracture Mechanics, Vol. 11, No. 3, (1979), 575–584.
18. Lindström, R., Johansson, L., Thompson, G., Skeldon, P., and Svensson, J.E., “Corrosion of magnesium in humid air”, Corrosion Science, Vol. 46, No. 5, (2004), 1141-1158.
19. Harlow, D.G., and Wei, R.P., “A probability model for the growth of corrosion pits in aluminum alloys induced by constituent particles”, Engineering Fracture Mechanics, Vol. 59, No. 3, (1998), 305–325.
20. Medved, J.J., Breton, M., and Irving, P.E., “Corrosion pit size distributions and fatigue lives—a study of the EIFS technique for fatigue design in the presence of corrosion”, International Journal of Fatigue, Vol. 26, No. 1, (2004), 71–80.
21. Xie J., Alpas A.T., Northwood D.O., “A mechanism for the crack initiation of corrosion fatigue of Type 316L stainless steel in Hank’s solution”, Materials Characterization, Vol. 48, No. 4, (2002), 271–277.
22. Ishihara, S., McEvily, A.J., and Shiozawa, K., “A fatigue‐crack‐growth‐based analysis of two‐step corrosion fatigue tests”, Fatigue and Fracture of Engineering Materials and Structures, Vol. 18, No. 11, (1995), 1311–1321.
23. Murakami, Y., “Metal Fatigue: Effects of Small Defects and Nonmetallic Inclusions”, Elsevier, (2002).
24. Hayashi, K., and Abe, H., “Stress intensity factors for a semi-elliptical crack in the surface of a semi-infinite solid”, International Journal of Fracture, Vol. 16, No. 3, (1980), 275–285.
25. Kosa, T., and DeBold, T., “Effect of Heat Treatment and Microstructure on the Mechanical and Corrosion Properties of a Precipitation Hardenable Stainless Steel”, In MiCon 78: Optimization of Processing, Properties, and Service Performance Through Microstructural Control, ASTM International, (1979), 367–392.
26. ASTM, “Standard Practice for Conducting Force Controlled Constant Amplitude Axial Fatigue Tests of Metallic Materials”, ASTM E466 - 15, ASTM International, (2002), 4–8.





International Journal of Engineering
E-mail: office@ije.ir
Web Site: http://www.ije.ir