Goch, GertPrekel, HelmutHelmutPrekel2020-03-092020-03-092016-07-19https://media.suub.uni-bremen.de/handle/elib/1178Photothermal measuring methods enable to analyse near surface zones up to some millimeters below material surfaces non-destructively. This doctor thesis examines new approaches to characterise thermal properties and to detect near-surface damages with thermal waves. Based on FEM-simulations, artificial neural networks and measurements, it shows strategies for the interpretation of photothermal signals. Furthermore, a new method to detect contact patterns of gear wheels by active thermography is demonstrated as well as the possibility to analyse the growth of nidride layers within gas nitriding processes.deinfo:eu-repo/semantics/openAccessPhotothermal measurementFEM-simulationartificial neural networksnear-process measurementnon-destructive analysiscontact pattern analysis620Dissertationurn:nbn:de:gbv:46-00105717-15