Advanced Features for the Qualification of Coatings by Means of Reflective Acoustic Microscopy
The main object of the investigation described in this paper is the usefulness of the V(z) response for the quantitative examination of the interfacial microstructures in coated parts. By means of the numerically calculated functions the experimental conditions for obtaining contrasted indepth patterns can be predicted. For this purpose the difference-characteristics of the calculated V(z) functions have been derivated as a quantitative tool for the estimation of the materials contrast conditions.
The adaptation of the theoretical functions with the experimentally measured V(z) curves is proofed by variation methods. The dependence of the changes in the response for different classes of material parameters with defocusing adjustment is demonstrated.
KeywordsSurface Crack Sound Velocity Rayleigh Wave Critical Angle Acoustic Parameter
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