放射線透過試験における像質値と欠陥検出度(昭和46年学協会刊行物掲載論文再録集)

概要

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The wire type image quality indicator was correlated with the sizes of defects of simple forms, such as slit, straight natural crack and spherical defects, at the discernible limit. In the case where the radiation is almost parallel to the slit direction, a simple relation was obtained experimentally between the wire diameter and the slit cross section parallel to the radiation direction. This relation was also applied to the straight natural crack taking the depth as a half of it. These relations are considered to be applicable for a range of wire diameters approximately 0.2 mm to 1.0 mm. For the case of angled radiation, the discernibility of straight natural crack decreased remarkably with the increase of radiation angle to the crack, while the discernibility of slit did not so much decrease as that of straight natural cracks. The spherical defect can be discerned at the same rate as 1T hole, if it has a diameter of 1.3 T.
独立行政法人海上技術安全研究所の論文
1972-02-28