Investigation of Wear Properties of Microtitanium and CNT Particulates Reinforced Copper Hybrid Metal Matrix Composite

Current engineering applications require materials that are stronger, lighter, and less expensive. Substituting composite structures for conventional metallic structures has many advantages because of higher specific stiffness and strength of composite materials. In the recent days, there is a huge demand for a lightweight material such as composites seems to be a promising solution to this arising demand. These materials have gained attention due to their applications in the field of automotive, aerospace, sports goods, medicines, and household appliances. This study represents the work done by various researchers and their methodologies. In contrast with most metallic materials, copper alloy has many remarkable properties, such as its excellent electrical and thermal conductivities, good strength, and formability, having outstanding resistance to corrosion and fatigue, and others. Due to their excellent properties, copper alloy is widely used in electrical, automotive, architecture, petrochemicals, transportation, and marine industry. In this work the different percentages of CNT and MicroTitanium are reinforced with pure Copper and are studied. The current work investigated the influence of the CNT and MicroTitanium on the wear behavior (tribological behavior) of developed hybrid metal matrix composite. The conventional liquid stir casting technique will be used for the fabrication of the composite materials. The composite was produced considering combination of0.5, 1, 1.5 percentages of CNT and 1, 3, 5 percentages of Micro-Titanium. The specimens were prepared as per ASTM standard size by turning and facing operations to conduct wear test. The specimens for investigation of wear were tested using pin on disk apparatus. Through the results, it is concluded that the hybrid MMC obtained has got better reduction in wear rate. The inclusion of CNT has played a major role in reducing the wear rate and addition of micro titanium has decreased the wear rate to some extent Keywords: Wear, Copper, Micro titanium, CNT, MMC

Effect of Al2O3-MoS2 on hardness and wear loss of Al-6061 hybrid metal matrix composite

Aluminium Composites are presently conquering their massive practice in aerospace, marine, automobile and other industrial applications due to their vital properties such as better strength, light weight etc. The main Purpose the present research is to investigate the role of Al2O3-MoS2 on Al6061 Metal Matrix Composites (MMCs). Composites with varying weight percentages of reinforcements like Al2O3 (3, 6 and 9%) and MoS2 (3, 6 and 9%) manufactured by using stircasting method. The result shows that uniform dispersal of reinforcements with in the matrix. Increasing the wt. % of Al2O3-MoS2 in Al6061 leads to improve in hardness and exhibits the better wear resistance of the composites. SEM analysis reveals the Al6061 alloy shows the deepest and widest wear tracks and whereas in hybrid composite (Al6061/Al2O3/MoS2), width and depth of wear tracks are considerably smaller which leads to improve the wear resistance

Fabrication and Mechanical Characterization of Aluminium 7075 Reinforced with Nano Graphene / B4C / Inconel alloy 625 using Ultrasonic Stir Casting Method

Aluminium 7075 widely used in aerospace and defence applications. At the present time, hybrid composite material utility is refining in all engineering areas as a result of high strength /weight ratio, good corrosive and wear resistance. In this research work deals with the fabricating of hybrid metal matrix composite of aluminium 7075 as base metal reinforced by varying weight percentage of Nano graphene (0.5,1,1.5,2) , B4C (2,4,6,8,) and Inconel alloy 625 (2,4,6,8). This boron carbide, Inconel alloy 625 particles having particle size of 50μm. The hybrid aluminium composite material fabricated utilizing liquid metallurgy ultrasonic stir casting method. Tension test, compression test, hardness test and flexural test were conducted to determine mechanical properties of the hybrid composite material. Morphology of the hybrid metal matrix composite were analysed by using SEM.