IJARSCT ISSN (Online) 2581-9429 International Journal of Advanced Research in Science, Communication and Technology (IJARSCT) Volume 3, Issue 1, April 2023 Copyright to IJARSCT DOI: 10.48175/IJARSCT-9014 94 www.ijarsct.co.in Impact Factor: 7.301 Machinability Studies of Aluminium-based Hybrid Metal Matrix Composites – A Critical Review Suhas Prakashrao Patil 1 , Kishor Laxman Ghadage 2 , Sahil Vishnu Bhave 3 Assistant Professor, Department of Mechanical Engineering 1 Students, Department of Engineering Management 2,3 Arvind Gavali college of Engineering, Satara, Maharashtra, India 1 IU International University of Applied Sciences, Berlin, Germany 2, 3 Abstract: Aluminium composites are being used in many industries like automobiles, aeronautical, signage, cabinetry, cladding and transportation. Aluminium has a lightweight, long lasting, weather resistance, fire resistance and ratio of strength- to- weight is high properties. In today's rapidly developing manufacturing industries, there are many challenges to use metal composites. Also, there is a need to do research on various input parameters, safety parameters and environmental impacts. now, today's era vehicle manufacturing companies are growing up faster. vehicle manufacturing companies are focusing on increasing speed and reducing weight of vehicles so it will be achieved by choosing appropriate metal compositions. For the machining process, a turning operation has been selected. As the material hardness increases cutting forces increase and there is a need to select proper material to cut these composites. For preparing various metal composites stir casting, sand casting, squeeze casting, in-setu method and powder metallurgy process were used. The aim of this study is to give better suggestions and understanding of which material composites should be used? What is the alternative metal by considering operating conditions for machining and performance parameters? Present study is being investigated considering cutting speed, feed rate and depth of the cut while machining and how it affects performance parameters such as high tool wear, hardness, strength, SR, castability and chips production etc. Suggested carbon fibre is an alternative and how it affects the motion of an object and how it adds value in safety by considering certain parameters. Keywords: Reinforcement, Carbon fibre, Composites, Stir casting I. INTRODUCTION Aluminium based MMCs have been being used in the manufacturing industries widely. "Aluminium is at once as white as silver, as incorrigible as gold, as tenacious as iron, as fusible as copper, and as light as glass. “Mostly we use Aluminium in the aerospace and automobile industry due to its feasible properties like easy extrusion and processing, high production efficiency, lightweight, durable and robust, high strength to weight ratio. Among the lots of metal composites aluminium composites are meeting industrial needs. Weight exert force directly on an object due to gravity so the weight of the object affects the motion of the object. Higher weight required more forces to start and stop the object so minimizing weight is the challenging task in front of manufacturing industries. In the car manufacturing industries, the focus area is increasing the speed of the vehicle so we required a minimum inertia for it. For the future scope, flying cars can be implemented successfully in the upcoming years so as keeping in mind safety factors and mid- air collision we should use lightweight, high strength and thermal resistance material composites as seeing future risk we should prepare for carbon fibre. On carbon fibre more study should happen. We can use carbon fibre in light weight and highly risky applications such as aerospace, automotive and construction of bridges. Not much research has been done on the addition of the carbon fibres reinforcement. There are lots of research gaps for excellent atomic structure development material. with a minimal increase in density over the base alloy. The superior mechanical properties achieved by the reinforcement in MMCs, on the other hand, significantly influence their “machinability”. This term which de- scribes the operational characteristics of a cutting tool in machining a material is rather ill-defined and is normally judged in terms of tool life, surface finish and power required for material removal [3]. Work piece variable