Abstract
Low cycle fatigue resistance of low-alloy pressure vessel steels was investigated in 561 K air and water over a wide strain amplitude range. It was found that fatigue resistance of the steels was enhanced in high-temperature water relative to high-temperature air under the low strain amplitude conditions (<0.3%) or in the high cycle regime (>2 × 104 cycles), while it was remarkably degraded in high-temperature water under the higher strain amplitude conditions. Fatigue cracking and fractographic features suggested that effects of hydrogen be involved in the present corrosion fatigue process in high-temperature water. Possible environmentally assisted cracking mechanisms are discussed.
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Wu, X.Q., Katada, Y. Strain-amplitude dependent fatigue resistance of low-alloy pressure vessel steels in high-temperature water. J Mater Sci 40, 1953–1958 (2005). https://doi.org/10.1007/s10853-005-1216-4
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DOI: https://doi.org/10.1007/s10853-005-1216-4