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Probability Approach For Prediction of Pitting Corrosion Fatigue Life of Custom 450 Steel
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نویسنده
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Salarvand A. ,Poursaiedi E. ,Azizpour A.
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منبع
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International Journal Of Engineering - 2018 - دوره : 31 - شماره : 10 - صفحه:1773 -1781
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چکیده
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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.
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کلیدواژه
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Corrosion Fatigue ,Corrosion Pit ,Crack Propagation ,High Cycle Fatigue ,Custom 450 Steel
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آدرس
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Islamic Azad University, Doroud Branch, Department Of Mechanical Engineering, Iran, University Of Zanjan, Department Of Mechanical Engineering, Iran, University Of Zanjan, Department Of Mechanical Engineering, Iran
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Authors
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