Abstract
Today’s automotive engineering increasingly demands state-of-the-art quality control. In order to assure their quality, components have to be inspected — ideally by means of non-destructive tests. However, many test cases do not offer reliable and automated non-destructive testing methods. Active thermography offers solutions to assure joint quality. This relatively new non-destructive evaluation method for materials and components is robust, contactless and two-dimensional. This paper provides an overview on the physical properties of the different investigated thermographic technologies: ultrasound, inductive and optical excitation of heat flows. By demonstrating the various test cases, by testing structural and elastic adhesives, mechanical clinch joints and laser-welded joints, the possibilities of respective excitation methods were discussed and examples of the results were demonstrated. Furthermore, the aspects of quality rating and automated testing were reflected.
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