Abstract
In this work, the electrochemical and stress corrosion cracking (SCC) behavior of Ti-6Al-3Nb-2Zr-1Mo alloy in simulated seawater at various solution temperatures were systematically studied. Results show rising test temperature increases the point defect density in passive film and deteriorates the stability. Therefore, SCC is promoted by localized anodic dissolution (AD). At 25 °C, SCC initiates in αp phase, and β phase hinders SCC propagation on account of the lower electrochemical activity induced by element segregation. While at 4 °C, the SCC propagation rate is higher than that at 25 °C, as the SCC propagation resistance of β phases decreases.
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