Crack detection in steel using a GMR-based MFL probe with radial magnetization

Author

Aguila-Munoz, J. ; Espina-Hernandez, J.H. ; Perez-Benitez, J.A. ; Caleyo, F. ; Hallen, J.M.

Author_Institution

Lab. de Evaluacion No Destructiva Electromagnetica (LENDE), IPN-ESIME-SEPI, Mexico City, Mexico

fYear

2013

fDate

11-13 March 2013

Firstpage

104

Lastpage

108

Abstract

This paper presents the development of a portable probe for detecting cracks in steel plates. The probe consists of a magnet and a giant magneto-resistance (GMR) sensor. The magnet provides a radial magnetization at the surface of the steel plate. The GMR sensor detects the tangential component of the magnetic flux leakage due to a crack in the steel plate. Two steel plates were inspected with six cracks of depths: 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 mm, and widths of 0.25 and 0.5 mm, respectively. The cracks were scanned with the GMR sensitivity axis at 90°, 80°, 70°, 60° and 50°. It is demonstrated that the output voltage of the GMR sensor is sensitive to the orientation of the crack.

Keywords

condition monitoring; crack detection; magnetic sensors; magnetoresistive devices; plates (structures); portable instruments; steel; structural engineering; GMR sensor; GMR-based MFL probe; crack detection; giant magnetoresistance sensor; magnetic flux leakage; portable probe; radial magnetization; steel plates; Magnetic flux leakage; Magnetic noise; Probes; Saturation magnetization; Sensitivity; Steel; GMR sensor; Magnetic flux leakage; crack detection; nondestructive evaluation; permanent magnet;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Communications and Computing (CONIELECOMP), 2013 International Conference on

Conference_Location

Cholula

Print_ISBN

978-1-4673-6156-9

Type

conf

DOI

10.1109/CONIELECOMP.2013.6525768

Filename

6525768