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Detection of stress concentrations around a defect by magnetic Barkhausen noise measurements

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8 Author(s)
Mandal, K. ; Applied Magnetics Group, Department of Physics, Queen''s University, Kingston, K7L 3N6, Ontario, Canada ; Dufour, D. ; Sabet‐Sharghi, R. ; Sijgers, B.
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The stress distribution around a 50% blind‐hole pit in a steel pipe with a 9 mm wall has been studied using high‐resolution magnetic Barkhausen noise (MBN) measurements. A magnetic disk read‐head is used as the pick up coil in the MBN probe. The study shows a stress concentration factor of ∼2 at the defect edge perpendicular to the direction of applied stress and ∼-0.6 at the edge parallel to the same. The experimental results are consistent with the analytical solutions obtained by the Airy’s stress function approach. © 1996 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:80 ,  Issue: 11 )