Angular‐dependent magnetic Barkhausen noise (MBN) measurements were performed on a pipeline steel sample for various values of applied uniaxial stress at three angles with respect to the sample’s zero stress magnetic easy axis direction. It was observed that the response of the MBN signal to stress was dependent upon the direction of the stress with respect to the zero stress easy axis. The stress response of the MBN signal was greatest for (i) tensile stresses oriented perpendicular to the zero stress easy axis direction and (ii) compressive stresses applied parallel to the easy axis direction. The modification of the MBN signal under an applied stress was attributed primarily to a change in the 180° domain wall population in the material investigated. Results were described by a model that considered regions of locally correlated domain behavior, termed ‘‘interaction regions,’’ that were typically the size of grains within the steel material. A basic result of the model was the stress required to modify the number of 180° domain walls within an interaction region. Theoretical calculations of these threshold stresses for a typical grain size were found to be in agreement with the range of applied stresses that was observed to modify the angular‐dependent MBN signal obtained from the sample.
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15 April 1996
Research Article|
April 15 1996
Investigation of the stress‐dependent magnetic easy axis in steel using magnetic Barkhausen noise
Thomas W. Krause;
Thomas W. Krause
Department of Physics, Queen’s University, Kingston, Ontario, Canada K7L 3N6
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L. Clapham;
L. Clapham
Department of Physics, Queen’s University, Kingston, Ontario, Canada K7L 3N6
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Andras Pattantyus;
Andras Pattantyus
Department of Physics, Queen’s University, Kingston, Ontario, Canada K7L 3N6
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David L. Atherton
David L. Atherton
Department of Physics, Queen’s University, Kingston, Ontario, Canada K7L 3N6
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J. Appl. Phys. 79, 4242–4252 (1996)
Article history
Received:
November 06 1995
Accepted:
December 17 1995
Citation
Thomas W. Krause, L. Clapham, Andras Pattantyus, David L. Atherton; Investigation of the stress‐dependent magnetic easy axis in steel using magnetic Barkhausen noise. J. Appl. Phys. 15 April 1996; 79 (8): 4242–4252. https://doi.org/10.1063/1.361878
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