الاضمحلال فوق الصوتي لمتراكبة (Al-Sic)‎ معززة بدقائق كاربيد السيليكون

الملخص EN

The present research deals with preparing (11) samples of composite materials with metal matrix represented by Aluminum alloy (AA3003)cast and particulate reinforced by (SiC) having particles volume fractions (5,10,15 Vol.%).

The alloy matrix and composite materials were prepared by stir casting method.

Stir casting technique was used to increase the homogeneity distribution of the particles in alloy matrix.

Average particle sizes of (75,106,150μm) were used.

The aim of this study is to investigate the relationships between ultrasonic attenuation and stirrer speed ,reinforcement contents of SiC reinforced Al-alloy (AA3003)composites .Attenuation (longitudinal and shear) were measured using the pulse-echo amplitude technique with normal and angle probes of (45°,60°,and70°) and frequencies of (2 and 4 MHz) .

The results show an increase in volume fraction of particles causes an increase in attenuation.

It was also found, that the ultrasonic attenuation decreases with increasing particle size.

It was observed that an increases in stirrer speed, increases in the longitudinal ultrasonic attenuation