定電位エッチングを用いたオーステナイト系ステンレス鋼 の塑性ひずみ検出手法の現場計測適用性
Applicability of potentiostatic etching method for evaluation of plastic strain in austenitic stainless steel structure
著者:
帆加利 翔太 Shota HOKARI 山本 康平 Kohei YAMAMOTO 渡邉 豊 Yutaka WATANABE
発刊日:
公開日:
Austenitic stainless steelDeformation twinNondestructive evaluationPotentiostatic etchingSlip
概要
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.
