Modification of dye/fluorescent penetrant testing in accordance with Industry 4.0

Abstract. Dye/liquid fluorescent penetrant testing is a non-destructive testing method. It is used to detect discontinuities exposed to the surface in engineering components and metals involving different manufacturing processes. This approach depends on the physical interplay between a tailored chemical liquid and the surface of the component being tested. As a result of this interaction, the liquid penetrates surface cavities and then emerges, providing a visual indication of the location and approximate dimensions of the openings. Several steps are involved in conducting this test. As a final procedure visual/mechanized (through different magnifying systems) is involved to detect the defects/flaws. The defects like laps, porosity, cracks, seams and other surface discontinuities can be detected speedily with high degree of reliability. Mechanization and automation of viewing the process is one of the aspects of Industry 4.0. This can be achieved with suitable devises to monitor the behavior of penetrant on the surface with the help of automatic cameras available in present scenario. This article reviews the automation aspects involved in dye penetrant test with modern techniques.