定電位エッチングによる塑性ひずみ検出手法を用いた オーステナイト系ステンレス鋼の塑性変形メカニズムの調査
Inspection of Plastic Deformation Mechanism in Austenitic Stainless Steel by potentiostatic etching Detection Method
著者:
帆加利 翔太 Shota HOKARI 山本 康平 Kohei YAMAMOTO 渡辺 豊 Yutaka WATANABE
発刊日:
公開日:
Deformation TwinNondestructive EvaluationPlastic StrainPotentiostatic EtchingStainless Steel
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, 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 preferential dissolution of the both bands. The etched slip line density bears a proportionate relationship to true strain and the straining temperature. On the relational equation between etched slip density and true strain, slope is a function of the straining temperature. Besides, the etched twin density bears an exponent relationship to true strain and the straining temperature.
