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Ultrasonic Velocity Ratio: An Effective Tool for In-Situ Materials Characterization

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Ultrasonic velocity measurements have been widely used for characterization of microstructure, texture and damage in materials. Based on ultrasonic velocity measurements in a wide range of alloy systems and data collected from literature, a new polynomial correlation between velocity ratio and ultrasonic velocity is established for isotropic solid materials. For specific materials/alloy systems, a linear increase in velocity ratio with increasing ultrasonic shear wave velocity is observed in a wide range of materials. An opposite behaviour to this is observed only for the effect of microcracks/porosity or pressure/stress on ultrasonic wave velocities. The change in velocity ratio associated with change in ultrasonic velocity is observed in all the cases. Further, as the velocity ratio does not require thickness to be measured physically, it has better potential for in-situ materials characterization applications than ultrasonic velocity. A few applications of velocity ratio for assessment of service induced degradation in materials are also discussed in the paper.
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Document Type: Research Article

Publication date: 01 March 2018

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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