Potentiostatic etching method has been suggested as a technique for detection of pre-existing plastic st rain of type 316 stainless steel which is strained at 250°C that is a temperature assumed nuclear reacto r water. After potentiostatic etching (1N HNO3, -600mVSCE, 20min, 35°C), slip lines appear as etched lin es on the surface of specimen, and their density has one-to-one correlation with pre-existing strain. Th is method has a high sensitivity and can detect at least 1% plastic strain. However, it is ...
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Optimizing electrochemical potential and exposure time for the detection method of plastic strain in austenitic stainless steels by potentiostatic etching

To ensure integrity of structures and components in nuclear power plants, the demand has been increased for establishing nondestructive method for detection of pre-existing plastic strain. In this study, potentiostatic etching method is applied to detect and quantitatively measure plastic strain imposed to austenitic stainless steels by tensile straining. After potentiostatic etching (1N HNO3, -600mVSCE, 20min), twin lines and slip lines appear as etched lines on the surface of specimen because of the...
英字タイトル:
Inspection of Plastic Deformation Mechanism in Austenitic Stainless Steel by potentiostatic etching Detection Method

To ensure integrity of structures and components in nuclear power plants, the demand has been increased for establishing nondestructive method for detection of pre-existing plastic strain. In this study, potentiostatic etch ing method is applied to detect and quantitatively measure plastic strain imposed to austenitic stainless steels by tensile straining. After potentiostatic etching (1N HNO3, -600mVsce, 20min), twin lines and slip lines appe ar as etched lines on the surface of specimen because of the pr...
英字タイトル:
Inspection of Temperature / Steel Composition Dependency of Plastic Deformation Mechanismin Austenitic Stainless Steel by potentiostatic etching Detection Method.

To ensure integrity of structures and components in nuclear power plants, the demand has been increased for establishing nondestructive method for detection of pre-existing plastic strain. In this study, we examined applicability of potentiostatic etching method, which developed in our past paper, for actual austenitic steel components. On etching condition, solution temperature is one of the critical parameter. Thus this method should be conducted at a constant temperature between 30°C -40°C. Using r...
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Applicability of potentiostatic etching method for evaluation of plastic strain in austenitic stainless steel structure

To ensure integrity of the structure such as nuclear power plant, the demand has been increased for establishing nondestructive method for detection of pre-existing plastic st rain. In this study, potentiostatic etching method is applied to detect and measure plastic strain imposed to austenitic stainless steel by tensile straining. After potensiost atic etching (1N HNO3, -600mVsce, 20min), the twin band appears as etched line on the surface of specimens. The etched twin band is observed by optical microsc...
英字タイトル:
Potentiostatic Etching Method for Detection of Pre-existing Plastic Strainin Austenitic Stainless Steel