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予ひずみ検出手法
英字タイトル:
Potentiostatic Etching Method for Detection of Pre-existing Plastic Strainin Austenitic Stainless Steel
著者:
帆加利 翔太 Shota HOKARI 鈴木 明好 Akiyoshi SUZUKI 渡辺 豊 Yutaka WATANABE
発刊日:
公開日:
Deformation TwinNondestructive EvaluationPlastic StrainPotentiostatic EtchingStainless Steel
Potentiostatic Etching Method for Detection of Pre-existing Plastic Strainin Austenitic Stainless Steel
著者:
帆加利 翔太 Shota HOKARI 鈴木 明好 Akiyoshi SUZUKI 渡辺 豊 Yutaka WATANABE
発刊日:
公開日:
カテゴリ: 第7回
キーワードタグ:Deformation TwinNondestructive EvaluationPlastic StrainPotentiostatic EtchingStainless Steel
概要
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 microscope and quantifie d as the etched twin band density. There is one to one relation between the etched twin band density and the amount of pre existing plastic strain in the range from 1% to 30%.
