Corrosion fatigue crack growth behaviours were experimentally evaluated for the parent metal, as-welded and PWHT specimens of SM53B steel. Multi-pass welding was done by a submerged arc welder. Metallographic observations along the weld fusion boundary were made to investigate the variation of microstructures through the thickness direction. PWHT was carried out at 650°C with holding time of 1/4hr and 40hr. The corrosion fatigue test was conducted in 3.5% NaCl solution with the frequency of 3Hz. In all cases, crack growth in corrosive environment was faster than that of in air. Besides, at the low †K region, crack growth was greatly influenced by corrosive environment and the heat treatment condition.
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Chung, S., Na, E. Environmental strength evaluation of welded steel joint in sea water. KSME Journal 4, 10–16 (1990). https://doi.org/10.1007/BF02953385
- Post Weld Heat Treatment(PWHT)
- Heat Affected Zone(HAZ)
- Residual Stress
- Stress Intensity Factor Range
- Corrosion Fatigue
- Corrosive Environment
- Electrochemical Reaction