Study on the properties of Al-23%Si alloy treated by ultrasonic wave

Al-23%Si alloy was treated using a novel ultrasonic system. The properties of the alloy were investigated. The results show that the microhardness of the alloy treated by ultrasonic wave was distributed more uniformly than that untreated by ultrasonic wave. The ultimate tensile strength of the alloy treated by ultrasonic wave was higher than that of the alloy untreated by ultrasonic wave. The alloy treated by ultrasonic wave had a more obvious strain hardening behavior. But there were more dimples of ductile failure on the fracture surface of the alloy untreated by ultrasonic wave. The change of the friction coefficient of the alloy treated by ultrasonic wave with increasing sliding time was small. The wear resistance of the alloy treated by ultrasonic wave was better than that untreated by ultrasonic wave.