The effect of magnetic anomaly detection technique in eddy current non-destructive testing

Issue title: Proceedings of the twelfth International Symposium on Interdisciplinary Electromagnetic, Mechanic and Biomedical Problems, ISEM Bad Gastein

Article type: Research Article

Authors: Kosmas, Konstantinos^a | Hristoforou, Evangelos^{a; *}

Affiliations: [a] Laboratory of Physical Metallurgy, School of Mining and Metallurgy Engineering, National Technical University of Athens, Zografou Campus, Athens 15780, Greece. E-mail: kkosmas@central.ntua.gr; eh@metal.ntua.gr

Correspondence: [*] Corresponding author. Tel.: +30 2107722178; Fax: +30 2107722119; E-mail: eh@metal.ntua.gr

Abstract: In this paper, we demonstrate a first approach of a non destructive testing method that is being oriented in detecting mainly near subsurface defects in ferromagnetic materials. This new technique is related to the parametric control and combination of the classic magnetic anomaly detection and the eddy current techniques that can be potentially used in common geometries giving the possibility not only to reveal the presence of defects, but also lead to their reconstruction when being parallel or perpendicular to the under inspection surface. This method is limited in depths of few mm due to the barrier of the penetration of eddy currents but its contribution in non destructive testing is coplementary to that of ultrasonic testing.

Keywords: Magnetic non-destructive testing, eddy currents, magnetic anomaly detection

DOI: 10.3233/JAE-2007-826

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 319-324, 2007