Abstract:In order to establish a strength evaluation method of a high strength material with a notch which has an inclusion, tensile tests of materials, which have various notch radii, and fracture toughness tests for casting high speed steel were performed. The validity of considering that an inclusion is equivalent to a crack and considering the influence of the interference between an inclusion and a notch on the tensile strength using the fracture mechanics was examined. The tensile fracture conditions were evaluat… Show more
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