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Effect of the Austenite Spacing in Duplex Stainless Steel on the Sour Cracking Resistance

This paper presents the results of a study aiming at evaluating the effect of austenite spacing on the sour cracking resistance of a duplex stainless steel. The stress corrosion cracking resistance was assessed using slow strain rate (SSRT) and constant load tests. Under SSRT, a clear effect of the austenite spacing is observed. Above a threshold spacing, the pH-pH2S acceptability domains are smaller as the austenite spacing increases. This effect is however not seen under constant load at 90% of the actual yield strength, suggesting that a dynamic straining or a large plastic strain is needed to highlight the effect of this parameter.
Product Number: 51324-20655-SG
Author: Christophe Mendibide; Matthieu Regniere
Publication Date: 2024
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