Design of hybrid composites from scrap aluminum reinforced with (SiC+TiO2+Gr+Ti+B)

Abstract

Hybrid Metal Matrix Composites (HMMCs) have very light weight, high strength, and show better resistance to corrosion, oxidation, and wear. Impact resistance is an especially important property of these HMMCs which is essential for automotive applications. In this study, hybrid aluminum matrix composites were designed through the powder metallurgy route. As matrix, fresh scrap aluminium chips (AA2014), byproduct of machining, were used. Silicon carbide (SiC), boron, titanium, titanium oxide (TiO2) and graphite (Gr) particles were used as reinforcement elements for the present work. The hybrid MMCs were prepared with SiC (5, 10 and 15 % by weight) as a main reinforcement and also certain amounts of Ti, B, TiO2 and graphite powders were added in the matrix. Within the framework of the present study, an original idea of producing a hybrid composite has been developed by using scrap aluminum (AA2014) chips. This consist of the mixing, blending and compacting of aluminum chips through press moulding and sintering. The influence of the reinforcement particles on the mechanical behavior of these composites was evaluated. Microstructure of each composite was analyzed by Scanning Electron Microscope (SEM). © The Society for Experimental Mechanics, Inc. 2017.