The Effect of Reinforcement Ratio on Mechanical Properties of AA2024 Matrix MgO+SiC Reinforced Hybrid Composites

Abstract

—In today's rapidly developing technologies, the place and importance of composite materials is gradually increasing and the studies carried out in these fields are continuing rapidly. While metal matrix composite materials form part of these studies, especially the applications of ceramic particle reinforced aluminium composites are expanding. Generally, different types and amounts of SiC, B4C, SiO2, Al2O3, TiC, MgO, TiB, etc. are added into the aluminium alloys of different quality ceramic reinforcement materials are added. However, composite materials are generally produced by using a variety of these reinforcing materials and are subject to scientific studies. In this experimental study; two different ceramic-based reinforcing materials, SiC and MgO, were mixed equally and then hybrid composite materials were produced with 3%, 6% and 12% (weight) reinforcements in 2024 quality aluminium alloy by vortex method. Density, hardness, transverse fracture and abrasive wear tests were carried out and as well as the microstructures of the composite materials were examined. According to the results, the porosity in the composite structure increased and the density decreased due to the increasing reinforcement ratio. On the other hand, the hardness of the composites increased with increasing reinforcement ratio. However, their cross fracture, and abrasion resistance decreased. It was concluded that it is useful to try different process parameters in order to obtain better mechanical properties in such composites produced by vortex method.