2002•Unpublished venueOpen access

An ultrasonic measurement of magnetostriction

B. Igarashi, G. A. Alers, P. T. Purtscher

Abstract

The amplitudes of shear horizontal plate waves generated by EMATs (electromagnetic acoustic transducers) are measured to obtain estimates of the magnetostriction of a steel specimen. The wave amplitude is linked to magnetostriction through an existing model that is modified in the present work to extend its applicability to a broader range of magnetic fields. Measurements with intermediate levels of EMAT currents yield estimates that best agree with strain-gage measurements of the magnetostriction.

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Available abstract

Key concepts: Magnetostriction, Electromagnetic acoustic transducer, Transducer, Acoustics, Amplitude, Ultrasonic sensor, Materials science, Strain gauge