| 摘要 |
PURPOSE:To make it possible to determine an accurate damage degree from the initial stage of the damage of a material, by directly and immediately determining the surface state of a material. CONSTITUTION:A stamp 3 is applied to a monitoring area. At this time, the stamp 3 is provided in order not only to merely positionally show the monitoring area in a material but also to discriminate the size and directionality of an objective analytical range. When the monitoring area could be specified, the surface of the material is polished to perform etching treatment and photographing by a microscopic camera is performed. A large number of crystal grains 6... and the grain boundaries 7 thereof are taken by thus obtained photograph 5 and, at the same time, the image of the stamp 3 is also picked up. Succeedingly, the photograph 5 is inputted to an image analyser 8 and the area other than the objective analytical range is removed by masking while the directionality shown by the stamp 3 is held on a cathode ray tube to enter analysis. In the analysis at this time, calculation is performed in a degree capable of corresponding by the fundamental soft program attached to the apparatus 8.
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