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Surface characterization by high-resolution nondestructive methods

 

Schmidt, H.:
3rd Saar-Lor-Lux Meeting on Tailoring of Materials for Industrial Applications
Luxembourg, 1993
Saar-Lor-Lux Meeting on Tailoring of Materials for Industrial Applications <3, 1993, Luxembourg>
Englisch
Konferenzbeitrag
Fraunhofer IZFP ()
Austenit; Austenite; cementite; eddy-currents; hybrid microscopy; Hybridmikroskopie; Wirbelstrom; Zement

Abstract
The formal similarities and physical differences between eddy current and thermal wave techniques are discussed. For metals, the ratio of the thermal diffusion length to the electromagnetic skin depth varies from 0.12 to 0.002. Images of cementite plates in austenite were obtained by an eddy current and by a thermal wave microscope. The hybrid microscopical approach allows to identify the permeability of the cementite as main source of contrast.

: http://publica.fraunhofer.de/dokumente/PX-35378.html