Penetrant Testing Blog

Does using aged penetrant materials reduce the likelihood of detecting fatigue cracks?

There is a body of research going on at a couple of places that have to do with penetrant inspection. At Sandia laboratories, the following question was investigated: “If a field inspector accidentally used aged penetrant materials, would that reduce the likelihood of detecting fatigue cracks?” To investigate this question, a careful laboratory test was designed, using specimens containing low cycle fatigue...