발간논문

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Vol.41, No.11, 779 ~ 786, 2003
Title
The Effect of Dissolved Hydrogen on the Corrosion Fatigue Crack Growth of 3.5NiCrMoV Steel
이정국 Lee Jeong Gug , 맹완영 Maeng Wan Yeong , 김우철 Kim U Cheol
Abstract
The effect of dissolved hydrogen on the corrosion fatigue crack growth(FCG) behavior of 3.5NiCrMoV steel in pure water at 25℃ and 150℃ was investigated. The corrosion fatigue crack growth rate measurements employing fracture mechanics specimens were performed in pure water. The water circulating loop system was used to control corrosion environment. The FCG rates highly increased in pure water with the large amount of the dissolved hydrogen (35 cc/kgH₂O) at 25℃. However, it made no difference to FCG in pure water at 150℃ regardless of the contents of the dissolved hydrogen(35 cc/kgH₂O; 0.1 cc/kgH₂O). The hydrogen embrittlement significantly influences the corrosion fatigue crack growth rate of 3.5NiCrMoV steel in pure water of 35 cc/kgH₂O at 25℃.
Key Words
Corrosion fatigue, 3.5NiCrMoV steel, Crack growth rate, Hydrogen embrittlement
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