Effects of processing parameters on 5052 semi-solid slurry prepared by ultrasonic vibration at 665℃ were researched. The results reveal that non-dendrite semi-solid slurry with grain size of approximately 110μm can be prepared by imposing ultrasonic for about 90 s on the alloy melt. With extending in ultrasonic time

grain shape becomes more and more round

however

roundness change can be neglected with holding more than 90 s. Starting-vibration temperature greatly affects the structure of the slurry. The 5052 aluminum semi-solid slurry with approximately 95μm in average grain size and spheroidized structure can be observed with introducing ultrasonic vibration at 675℃ for 90 s. Grain size is grown slowly in the slurry with holing within 2 min

however

grain begins to merge with holding for 4 min.