Metal matrix composites (MMCs) are the new-generation advanced materials that have excellent mechanical properties, such as high specific strength, strong hardness, and strong resistance to wear and corrosion. All these qualities make MMCs suitable material in the manufacture of automobiles and aircraft. The machining of these materials is still difficult due to the abrasive nature of the reinforced particles and hardness of MMCs. The conventional machining of MMCs results in high tool wear and slow removal of materials, thereby increasing the overall machining cost. The nonconventional machining of these materials, on the contrary, ensures much better performance. This paper reviews various research works on the development of MMCs and the subsequent hybrid composites and evaluates their performances. Further, it discusses the influence of the process parameters of conventional and nonconventional machining on the performance of MMCs. At the end, it identifies the research gaps and future scopes for further investigations in this field.
In the present investigation, an attempt was made to utilize RHA in the development of aluminium based composite material. AA6061 alloy was melted in muffle furnace. Preheated RHA and SiC were added in the aluminium alloy. Composite material was fabricated by stir casting technique. Microstructure image showed proper wettability of reinforcement material with aluminium alloy matrix. Uniform distribution was observed of reinforcement particles in aluminium alloy. It has been observed that by using the RHA and SiC simultaneously in aluminium alloy, mechanical properties were improved significantly. However; toughness and ductility were reduced. Heat treatment of composite material was also carried out to observe the enhancement of mechanical property. Results showed that after the heat treatment process, mechanical properties were further improved.
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