RameshG. et. al; International Journal of Advance Research, Ideas and Innovations in Technology © 2018, www.IJARIIT.com All Rights Reserved Page | 1707 ISSN: 2454-132X Impact factor: 4.295 (Volume 4, Issue 3) Available online at:www.ijariit.com Heat treatment on aluminum hybrid metal matrix composites G. Ramesh gramesh_me@yahoo.co.in MEA Engineering College, Malappuram, Kerala B. Gopinath gopi_npaktg@yahoo.co.in NPA Centenary Polytechnic College, Kotagiri, Tamil Nadu V. C. Uvaraja c_uva@rediffmail.com Bannari Amman Institute of Technology, Coimbatore, Tamil Nadu K. Karthick karthickkumaran1997@gmail.com Velammal Engineering College, Chennai, Tamil Nadu S. Prakash salaiprakash@gmail.com MeenakshiSundararajan Engineering College, Chennai, Tamil Nadu S. Harish Balaji hb7835@gmail.com MeenakshiSundararajan Engineering College, Chennai, Tamil Nadu ABSTRACT The Al alloy matrix materials exhibiting excellent mechanical properties with the addition of B4C particulates as reinforcement. Stir cast method is preferred for preparing composite specimen materials. Then the composites were prepared for heat treatment process by subjecting to solutionizing followed by quenching in different media for improving the mechanical and physical properties. Further, all the specimens are subjected to artifi cial aging at a temperature of 130˚C for different time duration. The hardness properties are examined. Due to excellent increase in the hardness the material removal rate decreases. It is also observed that Al hybrid metal matrix composite experimented under identical heat treatment conditions reveal significant enhancement in hardness. Keywords: HAMMCs, Solutionizing, Artificial ageing 1. INTRODUCTION In the recent development, metal matrix composites congregate to meet theincreasing overall demand for light weight, high performance, eco-friendly, wear, and corrosion resistant materials. The Hybrid Metal Matrix Composites (HMMCs) are in advance extensively used in some areas due to its enhanced mechanical properties (and lighter density) when compared with metals/alloys, particularly in applications where weight and strength are of most important consequence. The advantages of particulate reinforced composites over others are their formability with expenditure benefit and its different strengthening mechanisms [1]. Hybrid Aluminium Metal Matrix Composites (HAMMCs) are suitable for appliances which oblige characteristics such as combined strength, damping properties thermal conductivity, andco-efficient of thermal expansionalong with lesser density. The unique properties of HAMMCs enhance their usage in automotive and tribological applications [2-4] such as in pistons, brake drum, brake disc and cylinder block. The current improvement in metallic matrices, for the fabrication of HAMMCs consist of generally used metals viz., Al, Mg, Ti, Cu and their alloys reinforced with hard ceramic particles usually silicon carbide, alumina, [5,6] and soft particles usually graphite, talc etc.[7,8]. The reinforcements like fibers, whiskers,and particulates [9] areemployed particularly in Al-alloy composites leading to the latest invention of tailorable engineering materials with superior specific properties [10, 11]. This creates significance among the researchers to deliberate both on investigational and systematic segments of HAMMCs to expand an enhanced perceptive about the mechanical behavior of these materials and their exceptional wear resistance. In engineering materials system, the heat treatment processes are incredibly essential for improving the composite material properties. The main purpose of the heat treatment is to create the material system structurally and physically strong and fit for engineering application [12]. Heat treatment of aluminum alloys favors the maximum concentration of hardening solute to dissolve into solution. This method is suspiciously conceded out by heat treatment of an alloy to a temperature at which one single, solid phase exists. By this heat treatment, the solute atoms that are originally part of a two-phase solid dissolve into solution and originates as one single phase. Once the alloy is heated to the recommended solutionizing temperature, it is quenched