Abstract
The effect of stress hold time tH and stress rise time tR on corrosion fatigue crack growth rate is studied in the range from f=6.1×10-1 Hz to 4.63×10-3 Hz. In high frequency region, crack growth rate is almost cycle dependent against frequency as affected by tH. As tH increases, time effect becomes more and more remarkable. On the other hand, under corrosion fatigue for tH=0, crack growth rate is both time and cycle dependent in wider range of frequency, da/dN is formulated as a function of tR and tH.
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