Abstract
Corrosion fatigue property was investigated for quenched and tempered carbon steel and Cr-Mo steel under rotating bending in 3% NaCl aqueous solution at frequencies from 0.03 to 30 Hz and for test duration up to 10000 hours. Fatigue behaviour was found similar for the two steels: fatigue strength was monotonously decreased with increasing number of cycles and decreasing test frequency without presenting tendency of stabilization. The acquired data could be fitted by a simple hypothetical equation, log σ=A+(β/m)log f - k log(1+αt)-(1/m)log N where σ, N, f, t are stress, number of cycles, frequency, and test duration, respectively, and the other constants.
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