1704 塑性予ひずみ検出のための電気化学的手法の研究と適用性の検討(OS17-1 低サイクル疲労とその応用-予ひずみ、変動荷重の影響-)

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, potentiostatic etching method 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 twin line appears as etched line on the surface of specimen because of the preferential dissolution of the twin band. Loading rate hasn't affected the etched deformation twin density. But steel compositions have affected it because of difference of stacking-fault energy. This method may use to detect of low cycle fatigue.
一般社団法人日本機械学会の論文
2010-10-09