Comparison of applied pressure effect on improving density, hardness, and microstructure by both squeeze casting process and pressure die casting process for 380-Al alloy

الملخص EN

The present study includes the effect of applied pressure on elimination the porosities that formed during both squeeze casting process and pressure die casting.

For pressure die casting the pressure was applied on the full liquid molten alloy (750oC) where the pressure was applied on molten alloy at (650oC) i.e.

the molten was fifty liquid fifty solid (mushy zone).

The tests and measurements of density, hardness, and microstructure show the improvement in density and hardness for the samples of both techniques but the increasing in hardness and density values in squeeze casting were higher than the values of pressure die casting samples also the test of microstructure shows the decreasing in (DAS) for the squeeze sample more than the (DAS) of pressure casting samples.

The above improvement in microstructure, hardness, density belongs to the behavior of applied pressure in both cases which means that the mushy zone of molten alloy represents the optimum region to improve the mechanical properties by applied pressure.