摘要: Abstract Information on corrosion-fatigue crack growth in engineering structures is necessary for the prediction of service lives subjected to both fatigue loading and an aggressive environment. Thus, as part a long-range program aimed at establishing relations predicting behavior structural steels, effects cyclic-stress frequency various stress-intensity ranges below K Iscc rates were investigated 12Ni-5Cr-3Mo maraging steel room-temperature 3 per cent solution sodium chloride. The results analyzed by using linear-elastic fracturemechanics concepts compared with fatigue-crack-propagation data obtained air showed that primary factor affecting fatigue-crack-growth environmentmaterial system applied-energy release rate, ΔA(fx15-1), psi-in. Because (fx15-2) can be related factor, , crack-opening displacement, δ, crack-propagation also expressed terms or δ. Furthermore, indicate environment tested represented following equation: da dN = D(t)(Δfx15-3) where D(t) time (or frequency) dependent function which decreases magnitude increasing cyclicstress frequency.
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