THE INFLUENCE OF LOADING WAVEFORM ON CORROSION FATIGUE CRACK PROPAGATION

摘要

The influence of loading waveform on crack growth rate (da/dN) of corrosion fatigue (CF) was studied for iron in 3.5%NaCl and 3.5%NaCl+ l%NaNO_2 solutions at different applied potentials. The results showed that the effect of loading mode on da/dN of CF depends on the stress intensity factor range, the applied potential and the passivation state of system. The action mechanism of the loading waveform in the different conditions is discussed.