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http://dx.doi.org/10.3795/KSME-A.2010.34.8.1075

Bulk Shear-Wave Transduction Experiments Using Magnetostrictive Transducers with a Thin Fe-Co Alloy Patch  

Park, Jae-Ha (Center for Safety Measurement, Korea Research Institute of Standards and Science)
Cho, Seung-Hyun (Center for Safety Measurement, Korea Research Institute of Standards and Science)
Ahn, Bong-Young (Center for Safety Measurement, Korea Research Institute of Standards and Science)
Kwon, Hyu-Sang (Center for Fluid Flow and Acoustics, Korea Research Institute of Standards and Science)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.34, no.8, 2010 , pp. 1075-1081 More about this Journal
Abstract
Recently, the results of many studies have clarified the successful performance of magnetostrictive transducers in which a ferromagnetic patch is used for the transduction of guided shear waves; this is because a thin ferromagnetic patch with strong magnetostriction is very useful for generating and detecting shear wave. This investigation deals with bulk shear wave transduction by means of magnetostriction; on the other hand, the existing studies have been focused on guided shear waves. A modular transducer was developed; this transducer comprised a coil, magnets, and a thin ferromagnetic patch that was made of Fe-Co alloy. Some experiments were conducted to verify the performance of the developed transducer. Radiation directivity pattern of the developed transducer was obtained, and a test to detect the damage on a side drill hole of a steel block specimen was carried out. From the results of these tests, the good performance of the transducer for nondestructive testing was verified on the basis of the signal-to-noise ratio and narrow beam directivity.
Keywords
Bulk Shear Wave; Ferromagnetic Patch; Magnetostrictive Transducer; Radiation Pattern;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By SCOPUS : 0
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