Effect of stress ratio on the mechanism of environmentally-assisted fatigue crack growth in high strength steels

The environmentally-assisted fatigue crack growth (FCG) behavior of high strength steels, the effect of cathodic potential on the FCG rates, and fracture surfaces were examined in some aqueous solutions. The effect of stress ratio on the critical values of maximum stress intensity, as well as cyclic stress intensity range and da/dN, which define quantitatively the role of hydrogen-induced cracking and local anodic dissolution in crack propagation, were also examined.Published inProblemy Prochnosti, Nos. 1–2, pp. 94–102, January–February, 1995.