Reference blocks for penetrant testing

Abstract

Reference blocks for penetrant testing have been developed, allowing measurements using an optical microscope of both the opening width of surface defects and their depth. In this case, the condition that defect cavities do not extend onto the side faces of the blocks is met. Experimental data on the dependence of the defect’s indications area after development on their width (0.5—8.5 µm) and depth (40—860 mm) are presented. Using correlation analysis, the statistical significance of the above parameters is shown.