EFFECTS OF HOT ISOSTATIC PRESSING ON THE TENSILE PROPERTIES OF A۳۵۶ CAST ALLOY

The influences of age hardening and HIP (Hot Isostatic Pressing) on the mechanical properties of A۳۵۶ (Al ۷Si ۰.۶ Mg) casting alloys were studied. Cast bars were homogenized, heated and maintained at a temperature of ۵۴۰°C for a duration of ۲ hours, followed by rapid cooling in a polymeric solution. The castings were age hardened at ۱۸۰°C for a duration of ۴ hours before being subjected to HIP process at pressure of ۱۰۴ MPa for ۲ hours. The results indicated that the age hardening process used improved the tensile properties of A۳۵۶. The HIP process removed the internal surface-connected porosities and improved the ductility of the samples significantly. Additionally, HIP reduced scattering in the tensile test data

Keywords:

Hot Isostatic Pressing , Elongation , Surface Connected Porosity