Abstract

J_<IC> tests of SUS304 and SUS316L were performed according to ASTM E1820-06 with the parameter of the cold-work degree and specimen size. Specimen size, stretched zone width, tensile properties and J_Q were gathered, and then the model to estimate the similar value with J_<IC> was discussed. Regression analysis was carried out using the parameter of stretched zone and tensile properties. As the result, J_<IC> estimation expression with the small deviation within 10% was obtained.

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