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AC Magnetic Field Frequency Dependence of Magnetoacoustic Emission

Author
Wincheski, B.
Published
[1992].
Physical Description
1 electronic document
Additional Creators
Namkung, M., Fulton, J. P., and DeNale, R.
Online Version

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Summary
Our recent study has proved a strong correlation between the low-frequency AC applied magnetic field amplitude dependence of the asymmetry of the magnetoacoustic emission (MAE) burst and the strength of the domain wall-defect interaction in iron-base ferromagnets. For the present study the AC magnetic field frequency dependence of the asymmetry has been investigated in the range of 1 to 200 Hz. When represented by the third moment of the rectified acoustic emission pulses, the asymmetry becomes a bell-shaped function of frequency with its center located around 25 Hz. This experiment has been performed with low carbon, high yield stress steel specimens of three different levels of domain wall-defect interaction strength. The results show that the increase in the interaction strength causes a vertical down shift of the asymmetry in the entire frequency range investigated.
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Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 20040129648.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15634459