Nondestructive Characterization of Materials VIII pp 197-203 | Cite as
Magnetostrictive EMAT Efficiency as a Nondestructive Evaluation Tool
Chapter
Abstract
Electromagnetic acoustic transducers (EMATs) are ideal for on-line inspection of hot metal sheets, because they provide a noncontacting means for generating and detecting ultrasound in metals. EMATs are especially attractive for probing steels and magnetic alloys, because their transduction efficiency is larger than in nonferromagnetic materials. The source of the extra efficiency is magnetostriction, the length change of a ferromagnetic material that accompanies magnetization.
Keywords
Wave Amplitude Ferromagnetic Material Shear Horizontal Overaged Sample Shear Horizontal Wave
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Reference
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