Distribution of Corrosion Fatigue Crack Lengths in Carbon Steel : 2nd Report, The Distributed Cracks which Interact and Coalesce

抄録

It has been known that very small distributed cracks can be observed on the surface of smooth specimen subjected to corrosion fatigue, and the fatigue crack growth rate is accelerated by the interaction and coalescence of them. In this report, following the previous report of the authors, the interaction and coalescence behaviour of the distributed cracks on the specimen surface were observed in detail. Based on the experimental results, distribution of corrosion fatigue crack lengths after a certain cycles can be estimated theoretically. These estimated distributions of crack lengths coincided with those obtained experimentally.