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Stress Corrosion Crack Growth Behavior of Type 310S Stainless Steel in Supercritical Water
Abstract
Stress corrosion crack (SCC) behavior of Type 310S stainless steel (SS) in supercritical water was evaluated at 400°C to 550°C. Crack growth rates (CGR) were obtained as a function of temperature and corrosion potential. Results show that Type 310S SS exhibits 100% intergranular SCC, and creep plays an important role in the overall growth rate. The SCC CGR increases with temperature between 400°C and 550°C, and is higher at a medium-low corrosion potential (argon deaerated water) than in water with dissolved O2 or dissolved H2. A mechanism for SCC of Type 310S SS in supercritical water is proposed to explain the combined effect of SCC and creep.

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2019 in Scripta Materialia [IF: 4.16]
Kai Chen4
Estimated H-index: 4
(Shanghai Jiao Tong University),
Jiamei Wang1
Estimated H-index: 1
(Shanghai Jiao Tong University),
Donghai Du3
Estimated H-index: 3
(Shanghai Jiao Tong University)
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Abstract This work compared the stress corrosion cracking (SCC) susceptibility of two austenitic alloys in supercritical water (SCW), and revealed the quantitative difference of SCC growth rates through scanning transmission electron microscopy (STEM). Results showed that in-situ sensitization and creep occurred on the specimens during the SCC tests in SCW environment. Higher degree of Cr-depletion at the grain boundary ahead of the SCC crack tip was identified in the Fe- 25 Cr steel specimen, w...
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