OS0725 塑性予ひずみの検出・定量化のための電気化学的手法開発(構造用材料の疲労挙動と寿命評価,オーガナイズドセッション)

概要

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In recent years, the demand has been increased for establishing nondestructive inspection technique for detection of pre-existing plastic strain to ensure integrity of the structure such as nuclear power plant. In this study, electrochemical technique (potentiostatic etching) is applied to detect and measure plastic strain imposed to austenitic stainless steel by tensile straining. After potentiostatic etching (1N HNO_3, -600mV_<SCE> 20min), the slip line appears as etched line on the surface of specimen. The etched slip line is observed by optical microscope and quantified as the etched slip line density. There is one to one relation between the etched slip line density and the amount of pre existing plastic strain in the range from 1% to 30%.
一般社団法人日本機械学会の論文
2009-07-24