Study on the Effect of Casting Pressure on the Wear Resistance of Al-Si Alloy Prepared by Squeeze Casting

In this research the effect of applied casting pressure at constant pouring and die preheating temperatures on the microstructure and wear resistance of the squeeze cast Al-Si alloy was investigated. The results showed a refinement in the microstructure with increasing of the squeeze pressure. The results also showed that the density of the specimens decreased with application of a 7.5 MPa applied pressure, but it increased steadily for higher pressures up to 53 MPa. Increasing the squeeze pressure resulted in increasing the hardness and decreasing the wear rate. These results were explained based on the densification mechanism brought about by the application of pressure during solidification.