腐食疲労の寿命予測(<小特集>腐食防食小特集)

概要

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It can be regarded the the corrosion fatigue life consists of three processes; the growth of corrosion pits, the initiation of fatigue cracks from these pits and the propagation of fatigue cracks. Especially, the fatigue crack propagation life for a member subjected to considerably fast stress repetition, such as a turbine blade, is considered to be extremely short and sometimes neglected compared to other lives. The corrosion fatigue life in such a case may be estimated by predicting the corrosion pit growth behavior and the critical pit depth of fatigue crack initiation with a help of the fracture mechanics technique. It is made clear in this paper that the life predicted, regarding the corrosion pit as a microcrack, is in good agreement with the empirical results as well as that predicted by means of the conventional method proposed by the authors.
社団法人日本材料学会の論文
1984-11-15