Investigation of Ultrasonic Attenuation and Hardness Relationship in Ceramic-Metal Composites

Abstract

In material characterization, they contain a large amount of information at the frequency obtained about the mechanical and physical properties of the material under investigation, thanks to shear waves during the longitudinal passage of ultrasonic waves from materials.In this study, an experimental study was carried out on metal matrix composite samples to examine the variation of some ultrasonic parameters such as wave attenuation coefficients. Ultrasonic longitudinal and shear attenuation values obtained in copper-silicon carbide composites were measured at 4 MHz using the pulse-echo technique. All of the produced samples were sintered at 1050 ºC using microwave sintering technique. The variation of the shear attenuation values with the longitudinal wave in the material with the % SiC volumetric percentages of the hardness in the samples were measured. The experimental results obtained are discussed and analyzed to develop a technique in ultrasonic nondestructive testing for microstructure determination. It contains a large amount of information in the frequency obtained about the mechanical and physical properties of the material examined by the passage of ultrasonic waves through the materials. In this study, an experimental study was carried out to examine the variation of some ultrasonic parameters such as wave attenuation coefficients on metal matrix SiC doped composite samples. Ultrasonic longitudinal and shear attenuation values of produced copper-silicon carbide composite samples were measured at 4 MHz frequency by pulse-echo technique. Variations of longitudinal and shear attenuation values and hardness with % SiC volume percentages were determined. The experimental results obtained are discussed and analyzed to improve the ultrasonic nondestructive testing method for microstructure determination.