Abstract
This paper addresses the uniaxial corrosion fatigue behaviour of a maraging steel in a 5 g/L NaCl solution at 25 °C. SEM detailed observations evidenced a strong coupling between localized corrosion and the cyclic loading at the early stage of pitting and fatigue crack growth. As the crack is growing, the impact of dissolution is decreasing. A predictive corrosion fatigue model was proposed based on three stages: pit nucleation and growth, pit/crack competition and crack growth. The main contributions of the corrosive environment to failure mechanisms were found highly dependent on the mechanical loading conditions: cyclic loading and loading frequency.
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