Titlebook: Electromagnetic Acoustic Transducers; Noncontacting Ultras Masahiko Hirao,Hirotsugu Ogi Book 2017Latest edition The Editor(s) (if applicabl

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Coupling Mechanism and many studies appeared (Thompson (., ., .); Kawashima (., .); Il’in and Kharitonov (.); Wilbrand (., .); Ogi (.); Ogi et al. (.); Ribichini et al. (.)). This chapter presents the comprehensive analysis on physical principles of EMATs.

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Elastic Constants and Internal Friction of Advanced Materialsncontacting nature of EMAR allows accurate internal friction measurement as well. This chapter shows the mode-selective principle of the EMAR and its application for measuring elastic anelastic coefficients of various materials including metals, composites, ceramics, porous materials, thin films, and piezoelectric materials.

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Detection of Flaw and Corrosionrs at the defect edges, provide the information on the remaining thickness of the waveguides. The other is the point-focusing EMAT, which enables detecting stress corrosion cracking located close to the welded joint of austenitic stainless steel. A meander-line coil is designed to focus the generated SV waves at an intended point.

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Online Texture Monitoring of Steel Sheets, the .-value has been determined by measuring plastic strains of tensile specimens (Lankford et al. .) or resonance frequencies with ribbon coupons (Stickels and Mould .). They are destructive measurements. A nondestructive method hopefully a robust tool for online usage has long been needed.

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,Wärmewirtschaftliche Einrichtungen,ncontacting nature of EMAR allows accurate internal friction measurement as well. This chapter shows the mode-selective principle of the EMAR and its application for measuring elastic anelastic coefficients of various materials including metals, composites, ceramics, porous materials, thin films, and piezoelectric materials.