A Study of Criterion of HESCC Initiation and Prediction of Life Time in Duplex Stainless Steel

Analytical Evaluation of Hydrogen Embrittlement Type SCC and It's Mechanism in Duplex Stainles Weldmant

Abstract

In this paper, HESCC initiation condition was studied and HESCC initiation life prediction was done by numerical analysis method. In the analysis, the HESCC initiation condition was found to be determined by the correlation between hydrostatic stress and hydrogen activity in ferritic phase near the tip of austenitic phase on specimen surface. But the relationship between hydrostatic stress and hydrogen activity at the crack initiation state was consitituted of two lines which had different inclination in log-log figure.