International Journal of Mechanical and Production Engineering Research and Development (IJMPERD) ISSN (P): 2249–6890; ISSN (E): 2249–8001 Vol. 10, Issue 2, Apr 2020, 515–526 © TJPRC Pvt. Ltd. MECHANICAL BEHAVIOR AND CHARACTERIZATION OF STIR CASTED AZ31-CaSiO 3 METAL MATRIX COMPOSITES PENUGONDA SURESH BABU 1* , K. L. NARAYANA 2 & V. V. KONDAIAH 3 1Research Scholar, Department of Mechanical Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur District, Andhra Pradesh, India 2Professor, Department of Mechanical Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur District, Andhra Pradesh, India 3Associate Professor, Department of Mechanical Engineering, Bapatla Engineering College, Bapatla, Guntur District, Andhra Pradesh, India ABSTRACT Metal Matrix Composites (MMCs) are widely used in many engineering applications nowadays and play a key role, especially AZ31 magnesium alloy got much importance due to its specific characteristics suitable for both Engineering and Biomedical fields. In this work, MMCs with the pure AZ31 Magnesium alloy as matrix and Calcium silicate (CaSiO ) as reinforcement were developed with a bottom pouring type stir casting machine in argon gas inert 3 Article Original atmosphere. The percentage of CaSiO 3 has been increased from 2% to 8% in steps of 2% by weight. The microstructural analysis, X-ray diffraction (XRD) analysis and hardness tests have been performed and found that the reinforcement has been observed as CaSiO 3, which is distributed throughout the volume of the samples, no new phase or impurities were identified in the composites and composite with 98% AZ31 with 2% CaSiO 3 reveals better hardness values compared with other prepared composites. KEYWORDS: AZ31, Calcium Silicate, Hardness Test, Magnesium Composite & Stir Casting Received: Dec 20, 2019; Accepted: Jan 10, 2020; Published: Mar 12, 2020; Paper Id.: IJMPERDAPR202046 www.tjprc.org SCOPUS Indexed Journal [email protected] .