The corrosion fatigue crack growth (FCG) behavior of sensitized AlSl 304 stainless steel was studied in 0. 01M Na//2SO//4 solution at 250 C. Crack growth rates at different frequencies ranging from 1. 0 to 8 multiplied by 10** minus **3 Hz and at different electrochemical potentials were measured with a sinusoidal loading waveform at a load ratio of 0. 5. The results show that the FCG rate and fracture morphology depend on frequency and applied potential. At low frequencies (below 8 multiplied by 10** minus **2 Hz), there is a critical potential (between minus 450 and minus 200 mV//H) above which the FCG rates are enhanced over those observed at lower potentials. Fracture morphology depends on potential as well as frequency. At low potentials and/or higher frequencies, transgranular cracking is the principal mode of failure; however, at high potentials and/or at low frequencies, fatigue cracks propagate intergranularly.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Materials Science(all)