Title :
An ultrasonic measurement of magnetostriction
Author :
Igarashi, B. ; Alers, G.A. ; Purtscher, P.T.
Author_Institution :
Mater. Reliability Div., Nat. Inst. of Stand. & Technol., Boulder, CO, USA
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
Keywords :
carbon steel; ferromagnetic materials; magnetic variables measurement; magnetostriction; surface acoustic waves; ultrasonic measurement; ultrasonic transducers; B-H curve; electromagnetic acoustic transducers; magnetostriction; plate wave amplitudes; shear horizontal plate waves; ultralow-carbon steel specimen; ultrasonic measurement; Acoustic measurements; Acoustic transducers; Amplitude estimation; Current measurement; Electromagnetic measurements; Electromagnetic scattering; Magnetic field measurement; Magnetostriction; Steel; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-4153-8
DOI :
10.1109/ULTSYM.1997.663116
