TY - JOUR ID - TI - Comparison of Applied Pressure Effect on ImprovingDensity, Hardness, and Microstructure by Both SqueezeCasting Process and Pressure Die Casting Process for 380-Al Alloy AU - Dr. Najeeb S. Abtan Dr. Kadhim H. Ghlaim PY - 2012 VL - 12 IS - 2 SP - 334 EP - 344 JO - Iraqi journal of mechanical and material engineering المجلة العراقية للهندسة الميكانيكية وهندسة المواد SN - 20761819 AB - The present study includes the effect of applied pressure on elimination theporosities 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 theimprovement in density and hardness for the samples of both techniques but theincreasing in hardness and density values in squeeze casting were higher than thevalues of pressure die casting samples also the test of microstructure shows thedecreasing in (DAS) for the squeeze sample more than the (DAS) of pressure castingsamples.The above improvement in microstructure, hardness, density belongs to the behaviorof applied pressure in both cases which means that the mushy zone of molten alloyrepresents the optimum region to improve the mechanical properties by appliedpressure

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