Title: The effect of the angle of inclination of the exciting coil in electromagnetic-thermal non-destructive inspection

Authors: N. Tsopelas, N.J. Siakavellas

Addresses: Department of Mechanical Engineering and Aeronautics, University of Patras, 265 00 Patras, Greece. ' Department of Mechanical Engineering and Aeronautics, University of Patras, 265 00 Patras, Greece

Abstract: The effect of inclination of the exciting coil in electromagnetic-thermal non-destructive inspection of conductive plates is investigated numerically. Coils of finite height and planar coils, with circular or square section, are considered in various configurations. The heating of the plate is most effective when the coil inclination is 0° or 90° and less effective for intermediate angles of inclination. The heating by the planar coils is most effective for inclination of 0° and by the coils of finite height for inclination of 90°. The coil tilt reduces the detection region. However, a coil with 90° inclination gives better results in the detection of cracks situated at the centre of the detection region.

Keywords: coil tilt; crack detection; electromagnetic-thermal NDT; conducting materials; infrared thermography; eddy current; thin plates; circular coils; square coils; planar coils; angle of inclination; nondestructive testing; conductive plates.

DOI: 10.1504/IJMPT.2011.040294

International Journal of Materials and Product Technology, 2011 Vol.41 No.1/2/3/4, pp.162 - 177

Published online: 28 Feb 2015 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article