| 摘要 |
PROBLEM TO BE SOLVED: To evaluate crack evolution velocity of metallic material with high accuracy and to evaluate remaining life as well. SOLUTION: The evaluation method for crack evolution velocity of metallic material of the present invention comprises: a measurement step (S2) for measuring crystal orientation at multiple measurement points in a region including a tip of crack in a sample formed of metallic material by an EBSP method; an analysis step (S3) for analyzing a misorientation function value indicating deviation of the crystal orientation at each measurement point to acquire an evaluation parameter of the sample; and evaluation steps (S4, S5) for evaluating the crack evolution velocity of the sample based on the evaluation parameter of the sample acquired by the analysis at the analysis step, by referring to correlation between a crack evolution velocity and an evaluation parameter acquired from another sample which is formed of the same kind of metallic material as the sample and whose crack evolution velocity is known since a crack evolution test is performed in advance. COPYRIGHT: (C)2012,JPO&INPIT |
