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Magnetic Property Effects of the Strip on Transducer Sensitivity in a Magnetostrictive Strip Type Guided Wave Transducer  

Kim, Sung-Joon (Department of Physics, Yeungnam University)
Choi, Myoung-Seon (Department of Physics, Yeungnam University)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.28, no.2, 2008 , pp. 205-210 More about this Journal
Abstract
Magnetic hysteresis loops of a nickel strip and a Fe-Co alloy strip, which have been used in magnetostrictive strip type guided wave transducers for long range ultrasonic testing of pipelines, were measured and then magnetic property effects of a strip on transducer sensitivity were analyzed. The sensitivity of an optimized Fe-Co strip transducer was superior to that of the nickel strip transducer by a factor of about 30. It was shown that this was mainly attributed to the differences in remanence magnetization and coercivity of the two magnetostrictive materials.
Keywords
Long Range Ultrasonic Testing; Guided Wave; Torsional Mode; Magnetostrictive Strip; Remanence;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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