ルビーレーザを用いた超音波発生における力学パラメータの評価

概要

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Laser ultrasound measuring experiments were conducted to investigate mechanical parameters of ultrasound generation by ruby-laser deposition. Mechanical parameters (pulse duration, pulse pressure, acting area, etc) are important for quantitative and precise understanding of laser ultrasound behavior in solid materials. Laser ultrasound was generated on a front specimen surface by q-sw ruby-laser deposition (2 joule/pulse), and was detected on the back surface using an optical heterodyne probe which reads surface displacement directly. We used thin steel specimens to avoid propagation loss of laser ultrasound and recorded laser ultrasonic waveforms as a function of ultrasonic generating position and specimen thickness. We examined these waveform data to make clear the ultrasonic behavior and the mechanical parameters of ultrasonic generation by laser deposition. Another experiment was carried out to measure impulse by ruby-laser deposition with a pendulum to which impulse by laser deposition was given.
一般社団法人日本機械学会の論文
1998-04-26