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Analysis of the contribution of local anodic dissolution and hydrogen embrittlement to the corrosion fatigue, of steels

Research paper by L. V. Ratych, Ya. T. Fedorovych

Indexed on: 01 Nov '96Published on: 01 Nov '96Published in: Materials Science



Abstract

On the basis of the results of the investigation of cyclic corrosion crack-growth resistance with regard for the electrochemical conditions at the tip of a corrosion-fatigue crack, we present a quantitative analysis of the mechanisms of local anodic dissolution and hydrogen embrittlement for 20N2M and 15Kh2NMF steels in distilled water. This analysis is based on the evaluation of the contributions of these mechanisms to the increase in the fatigue crack growth rate in the media. The maps of this analysis are constructed as functions of the range of the stress intensity factor and the frequency of loading.