Microstructral Evolution of the Dendritic AlSi₇Mg Alloy during Semi-solid Remelting

The microstructural evolution during partial remelting of dendritic AlSi₇Mg alloys was studied with the help of an electrical fumace. The results show that it is difficult to change all the primary a dendrites into the spheroidal α phases, when the dendritic samples of AlSi₇Mg alloy are remelted under 589 or (597±1)℃ and held on mis condition for 5 to 120 min. The results also show that the samples remelted can be deformed under the heavy force, if the holding time is longer under higher temperature.