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Quantitative eddy current variants for micromagnetic microstructure multiparameter analysis -3MA-.

Quantitative Wirbelstromprüfverfahren-Varianten für mikromagnetischen Multiparameter Mikrostruktur Analyse. 3MA
 
: Becker, R.; Dobmann, G.; Rodner, C.

Review of Progress in Quantitative Nondestructive Evaluation. 7B
New York: Plenum Publishing, 1988 (Review of Progress in Quantitative Nondestructive Evaluation 7B)
S.1703-1707
Annual Review of Progress in Quantitative Nondestructive Evaluation <14, 1987, Williamsburg/Va.>
Englisch
Konferenzbeitrag
Fraunhofer IZFP ()
Auflösungsvermögen; Barkhausen-Effekt; Ferritkern; Finite-Elemente-Methode (FEM); Härten(induktiv); Härtetiefe; Induktionshärte; Kalibrieren; Laser-Härten; Leitfähigkeit(elektrisch); Magnetisierungskurve; Modell(mathematisch); Permeabilität; Permeabilitätsmessung; Prüfung(magnetisch); Wirbelstrom

Abstract
3MA-techniques like magnetic Barkhausen-noise- and incremental-permeability measurements need the magnetization of the material in a hysteresis loop. Now additionally two eddy-current techniques are developed which work with ferrite-core-pick-up-coils. The first one allows the determination of the properties electrical conductivity and initial incremental permeability; 2D-finite-element interpretation is used for calibration. The second technique is an eddy-current impedance spectroscopy which can be used to evaluate hardness gradients received by induction- and Laser-hardening. The contribution refers the new techniques, their detectability and resolution. (IZFP)

: http://publica.fraunhofer.de/dokumente/PX-30639.html