TY - JOUR
T1 - A magnetic perturbation GMR-based probe for the nondestructive evaluation of surface cracks in ferromagnetic steels
AU - Aguila-Muñoz, J.
AU - Espina-Hernández, J. H.
AU - Pérez-Benítez, J. A.
AU - Caleyo, F.
AU - Hallen, J. M.
N1 - Publisher Copyright:
© 2016 Elsevier Ltd. All rights reserved.
PY - 2016/4
Y1 - 2016/4
N2 - In this paper, a new portable magnetic perturbation probe using a Giant Magneto-Resistance (GMR) sensor to detect and characterize surface cracks in ferromagnetic steels is presented. Measurements from one tangential component of the magnetic flux density are obtained during a single scan over a crack, and two parameters are defined from the output voltage of the GMR sensor: the distance between the peaks, DX, and their voltage difference, DV. The correlations between DX and DV and crack features such as depth, width, and orientation angle are determined. Sensitivity analyses are performed based on the studied features. The probe permits the user to obtain the crack's orientation angle using only one measured tangential component of the magnetic flux density. A simple procedure to estimate the crack's features is proposed based on the presented analysis.
AB - In this paper, a new portable magnetic perturbation probe using a Giant Magneto-Resistance (GMR) sensor to detect and characterize surface cracks in ferromagnetic steels is presented. Measurements from one tangential component of the magnetic flux density are obtained during a single scan over a crack, and two parameters are defined from the output voltage of the GMR sensor: the distance between the peaks, DX, and their voltage difference, DV. The correlations between DX and DV and crack features such as depth, width, and orientation angle are determined. Sensitivity analyses are performed based on the studied features. The probe permits the user to obtain the crack's orientation angle using only one measured tangential component of the magnetic flux density. A simple procedure to estimate the crack's features is proposed based on the presented analysis.
KW - Crack orientation
KW - Crack sizing
KW - Ferromagnetic steel
KW - GMR sensor
KW - Magnetic perturbation
KW - Permanent magnet
UR - http://www.scopus.com/inward/record.url?scp=84957882270&partnerID=8YFLogxK
U2 - 10.1016/j.ndteint.2016.01.004
DO - 10.1016/j.ndteint.2016.01.004
M3 - Artículo
SN - 0963-8695
VL - 79
SP - 132
EP - 141
JO - NDT and E International
JF - NDT and E International
ER -