Charpy test piece fracture surface evaluation device

摘要

PROBLEM TO BE SOLVED: To provide a fracture surface evaluation device for a Charpy test piece that can be used for accurately determining whether a fracture surface of a Charpy test piece is a brittle fracture surface or a ductile fracture surface. A fracture surface evaluation apparatus 100 according to the present invention is arranged so as to face a fracture surface S1 of a Charpy test piece S, and captures an image of the fracture surface from a direction (Z direction) substantially perpendicular to the fracture surface. When viewed from the means 1 and a direction substantially perpendicular to the fracture surface, at least from the direction (Y direction) orthogonal to the direction (X direction) in which the notch previously machined in the Charpy test piece extends to the fracture surface. The light irradiating means 2 for irradiating the light L with the moving light, the moving means 3 for moving the light irradiating means in a direction substantially perpendicular to the fracture surface, and the predetermined moving position of the light irradiating means for moving by the moving means. A calculation unit 4 for obtaining a captured image of the fracture surface imaged by the means, calculating a density value of a predetermined pixel region in the captured image, and calculating a change in the density value of the pixel region according to the movement position of the light irradiation unit. , Is provided. [Selection diagram]