Influence of high‐intensity ultrasonic treatment on the phase morphology of a Mg‐9.0wt.%Al binary alloy

Abstract The effect of ultrasonic treatment on the β‐phase (Mg 17 Al 12 ) morphology of an Mg‐9.0wt.%Al alloy was studied. The result shows that with high‐intensity ultrasonic vibration employed during the solidifying of Mg‐9.0wt.%Al, the β‐phase in the entire cross section of the billet is significantly refined and also changed from continuous to discontinuous morphology. Spherical β‐phase is formed during the solidification of the billet treated with high‐intensity ultrasonic vibration.