Characterization of and Structure - property Relations in a Pressure Die-Cast Hypoeutectic Al - Sı Alloy Dispersed with Graphite Particles

Abstract

Observations made during the casting of a graphitic aluminium alloy into an intricate shape such as a scooter handle cover by pressure die casting are reported. The matrix alloy selected for the dispersion of graphite particles was a heat treatable Al-Si alloy (BS LM 16). Defect free perfect shape of the component was noted. Other interesting features were improved uniformity of graphite dispersion in the matrix, fracture of graphite, microstructural refinement of the matrix and better dispersoid/matrix interface. A comparison of the results between pressure die cast (PDC) and gravity die cast (GDC) components has been made