Author(s)

A. Maslouhi & R. Leblanc

Abstract

A Laser-ultrasonic technique has been used as a non-contact evaluation technique to monitor the mechanical property degradation due to the thermal exposure of the materials. Ultrasonic high-energy pulses were generated on a variety of materials, using a Q-switched Nd:YAG laser. The detection of ultrasound waves was performed by a confocal Fabry-Pérot interferometer. The effect of exposure of aluminum alloy to high temperatures has been studied using traditional ultrasonic techniques, and a non-contact technique. Measurements of ultrasonic velocity and attenuation were performed to characterize microstructure and to assess the mechanical properties of the aluminum alloy. Ultrasonic wave measurements were used in conjunction with mechanical tests and electrical conductivity measurements to distinguish

Keywords