Abstract
The corrosion fatigue behavior of a modified SAE 4135 steel in a H2S environment is compared to that of a standard SAE 4135 steel of the same strength level. The modification consists of an increase in molybdenum content from 0.20 to 0.75 pct and the addition of 0.036 pct columbium. It was found that the high cycle fatigue strength of the modified steel was 66 pct higher than that of the standard steel. The improvement is attributed to an increase in resistance to hydrogen embrittlement brought about by a higher tempering temperature which reduces the amount of phosphorous on grain boundaries, as well as the beneficial scavenging effects associated with the increase in molybdenum content and the presence of columbium.
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Formerly Graduate Student at University of Connecticut, is now with Nippon Kokan, K. K., Fukuyama, Japan.
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Tsukada, K., Minakawa, K. & McEvily, A.J. On the corrosion fatigue behavior of a modified SAE 4135 type steel in a H2S environment. Metall Trans A 14, 1737–1742 (1983). https://doi.org/10.1007/BF02654402
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DOI: https://doi.org/10.1007/BF02654402