抄録
Fatigue crack growth behavior of A533B steel was studied in 288℃ water environment using CT specimens machined from four different orientations of the material with 150mm thick. Fatigue crack growth rate in water at ambient air and in hydrogen gas was also examined. The effects of anisotropy, test frequency, water temperature and hydrogen gas on the crack growth behavior of A533B steel were evaluated. The results show that anisotropy did not have a significant effect on the fatigue crack growth rate in 288℃ water at frequency of 0.5 to 0.05Hz. The fatigue crack growth rate in ambient water was slightly higher than that in 288℃ water and in ambient air. At ΔK above 40 MPa m, the fatigue crack growth rate in hydrogen gas was markedly accelerated compared to that in 288℃ water.
