Title :
Excitation of bulk shear waves in steel by magnetostrictive coupling
Author :
Igarashi, B. ; Alers, G.A.
Author_Institution :
Mater. Reliability Div., Nat. Inst. of Stand. & Technol., Boulder, CO, USA
Abstract :
This work presents a novel configuration of an EMAT that, through magnetostriction, generates shear waves propagating normal to the surface of a steel sample. The transduction mechanism of the EMAT is discussed, and the effects of altering parameters of the EMAT are illustrated. If the EMAT is set up correctly, then it is shown that the EMAT provides means for ultrasonically measuring the magnetostriction of a sample
Keywords :
acoustoelectric transducers; electromagnetic devices; magnetostrictive devices; steel; ultrasonic transducers; EMAT; bulk shear wave excitation; electromagnetic acoustic transducer; magnetostriction; magnetostrictive coupling; steel; ultrasonic measurement; Coils; Couplings; Magnetic field measurement; Magnetic fields; Magnetic shielding; Magnetostriction; Polarization; Pulse amplifiers; Steel; Surface waves;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.762287
