Applicability of potentiostatic etching method for evaluation of plastic strain in austenitic stainless steel structure
帆加利 翔太 Shota HOKARI 山本 康平 Kohei YAMAMOTO 渡邉 豊 Yutaka WATANABE
Austenitic stainless steel Deformation twin Nondestructive evaluation Potentiostatic etching Slip
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 replica method, etched grooves on specimen surface can be transferred with high accuracy. Measurement process of electropolish and potentiostatic etching method for actual structure with potable probe and replica method is also presented.