An Investigation on the Mechanical Properties of Hybrid Metal Matrix Composites

Abstract

Aluminium alloy materials found to the best alternative with its unique capacity of designing the materials to give required properties. Aluminium alloy Metal Matrix Composites (MMCs) are gaining wide spread acceptance for automobile, industrial, and aerospace applications because of their low density, high strength and good structural rigidity. In the present work, an attempt is made to prepare and compare the mechanical properties of Al6061-SiC & Al6061-SiC/Graphite hybrid composites. The composites were prepared using stir casting method in which amount of reinforcement is varied from 5-15% in steps of 5wt%. The prepared composites are characterized by microstructural studies and density, and mechanical properties were evaluated as per the standards. The microphotographs of the composites revealed fairly uniform distribution of the particles in composites with clustering at few places. The experimental densities were found to be lower than theoretical densities in all the composites. The dispersed Graphite and SiC in Al6061 alloy contributed in enhancing the tensile strength of the composites. The scanning electron micrographs of the samples indicated uniform distribution of the reinforcement particles in the matrix without any voids.

Effect of Bottom Ash and Fly Ash as a Susceptor Material on The Properties of Aluminium Based Composites Prepared by Microwave Sintering

“…As it can be seen, the density of the sample for both type susceptor shows not much different but it shows the increment as SiC reinforcement increased. However, In previous studies, the density increased as the content of SiC reinforcement increased [9]. This is due to percentage of SiC reinforcement reduce the pores in aluminum matrix.…”

Mechanical Properties of Al 6061/Al2O3 Nanocomposite by Stir Casting

“…Whereas, the yield stress, ultimate tensile strength, and compressive strength were noticeably increased. The mechanical properties for Al6061-SiC and Al6061-SiC/Graphite hybrid composites were effectively studied by Krishnaa and Xaviorb [12]. Significant improvements in the tensile strength of the composites were observed, due to the contribution of the dispersed Graphite and SiC in Al6061 alloy [12].…”

Optimization of Stir Casting Method of Aluminum Matrix Composite (AMC) for the Hardness Properties by Using Taguchi Method

“…Although Al is capable in reducing the weight of automotive components mechanical properties of aluminum such as hardness, strength and impact properties should be improved. Several studies have been performed to meet these challenges in terms of the processing route, design and material modification (Krishna & Xavior 2014;Latif, Sajuri & Syarif 2014;Sun, Lyu, Jiang & Zhao 2014;Vogiatzis, Tsouknidas, Kountouras & Skolianos 2015).…”

“…Many researchers have added ceramic particles to increase the mechanical properties of aluminum such as SiC, Alumina, TiC and Graphite (Alaneme & Sanusi 2015;Dehghan Hamedan & Shahmiri, 2012;Ghazali 2006;Krishna & Xavior 2014;Moses, Dinaharan & Sekhar 2016;Sharma, Sharma & Khanduja 2015;Silva, Stainer, Al-Qureshi, Montedo & D.Hotza 2014). SiC is a non-oxide ceramic material that was used for the fabrication of AMC (Rosso 2006).…”