Material factors in relation to development time in liquid-penetrant inspection. Part 3. Testing of model plates

摘要

The paper is the continuation of the previous ones entitled ?Material factors in relation to development time in liquid-penetrant inspection. Part 1. Material factors“ and ?Material factors in relation to development time in liquid-penetrant inspection. Part 2. Investigation programme and preliminary tests“ in which material factors influencing essentially the development time in penetrant testing as well as the range of their values have been specified. These factors are: material kind, surface roughness and imperfection width.