The effects of electrochemical parameters in terms of electrochemical potential on stress corrosion cracking growth rates of au stenitic stainless steels in high temperature pure water are analyzed based on obtained experimental results and reported data. The effect of decreasing electrochemical potential is more significant in non-hardened sensitized and non-hardened stainless s teels than that in strain-hardened stainless steels, which is also supported by the results of Ni-base alloys and weld metals....
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Effects of Electrochemical Parameters on SCC of Stainless Steels inSimulated BWR Environments

The effect of scratches on oxidation evolution of Alloy 600 was monitored by EIS in 290A°C simulated primary water. EIS result indicates that oxide film reached a stable condition until 7 days' immersion. The scratched Alloy 600 possessed almost the same evolution of oxide film with plain specimens. Anodic polarization was pe rformed to study combined effect of scratches and charged hydrogen. The anodic current changes of scratched A lloy 600 after hydrogen charging were not the simple superimposition bet...
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Electrochemical response of scratched Alloy 600 in simulated primary waterand its influence with hydrogen entry

This study investigates the anodic behavior of Alloy 690 thermal treated (TT) in Pressurized Water Reactors (PWRs) primary water at 290°C, 9 MPa by means of polarization measurement, electrochemical impedance spectroscopy (EIS) and X-ray photoelect ron spectroscopy (XPS) analysis. Experimental results of hydrogen charged and uncharged Alloy 690TT show that hydrogen increases anodic steady current density and decreases capacitance loop, which implies that charged hydrogen changes the electroch emical proces...
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?The anodic behavior of Alloy 690 in simulated PWR primary water at 290°C

Plastic strain as a function of the distance from a growing stress corrosion crack tip is quantitatively evaluated by three-dimensional ela stic-plastic finite element analysis. The strain distribution obtained by node-release simulation of crack growth follows the logarithmic l aw. The criteria for the transition from a stationary crack to a growing crack were investigated. Results suggested that the prediction of crack growth by the FRI model, in which oxidation kinetics and continuum mechanics has been...
英字タイトル:
Finite Element Analysis of Plastic Strain Distribution at a Distance from Growing Stress Corrosion Crack in Light Water Reactor Environment