Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Ndt Systems & Services Ag

Ndt Systems & Services Gmbh & Co. Kg

Andre Yashan

Frank Niese

Herbert Willems

Michael Disque

Rainer Becker

The invention relates to a method for nondestructive testing of a metallic workpiece () using an ultrasonic transducer testing head having the following steps: to generate an ultrasonic wave, an excitation pulse is transmitted using the ultrasonic transducer () to the workpiece (), a response signal is measured using the magnetic field sensor (), testing information, preferably transit time information of the ultrasonic wave and therefrom wall thickness information about the thickness of the workpiece (), is ascertained on the basis of an ultrasonic echo component of the response signal, and further information, in particular distance information about the distance of the testing head from the workpiece (), is ascertained on the basis of a magnetic field component of the response signal by supplementary analysis. The invention also relates to a corresponding analysis method for analyzing measurement data which has been ascertained using an ultrasonic transducer testing head and a system for nondestructive testing of a metallic workpiece.

Method and system for non-destructively testing a metallic workpiece

Disclosed is a method for quantitatively determining the width of a soft zone area of a partially hardened metallic workpiece, which has at least one hardened and one unhardened area, by means of at least one multifrequency eddy current sensor. A single workpiece being individually is moved relative to the multifrequency eddy current sensor in such a manner that a spatially delimited eddy current field generated by the multifrequency eddy current interacts with the workpiece contactlessly, generates eddy currents therein which, in turn, generate a measuring signal in the multifrequency eddy current sensor, in which the spatially delimited eddy current field has a greatest extension oriented in longitudinal direction to the surface of the workpiece which extension is greater than the maximum extension of the soft zone area in longitudinal direction of the surface of the workpiece.

Method for quantitatively determining the width of a soft zone area of a partially hardened workpiece

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Saarbrücken, Germany

Andre Yashan