Corrosion - Fatigue Strength of Notched High-Tension Steel Specimens Under Cathodic Protection in Synthetic Seawater

概要

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The corrosionfatigue strength of notched high-tension steel (HT 50 and HT 80)specimens was investigated under cathodic protection in synthetic seawater. For slight notches (stress concentration factor, α_k≦2), the fatigue strength under cathodic protection decreases with an increase in α_k and is almost the same as that in laboratory air, because the cathodic protection retards the formation of corrosion pits. When α_k is further increased, the corrosion fatigue strength reaches a constant value which is probably the fatigue strength of the circular-cracked specimen. The value is higher than that in laboratory air due to the formation of nonpropagating cracks. The fatigue strength of the welded specimen corresponds well to that of the notched specimens. It should be noted that welded structures have a strong notch effect on the corrosion-fatigue strength.
一般社団法人日本機械学会の論文
1990-07-15