Rapid innovation in nanotechnology in recent years enabled development of advanced metal matrix nanocomposites for structural engineering and functional devices. Carbonous materials, such as graphite, carbon nanotubes (CNT's), and graphene possess unique electrical, mechanical, and thermal properties. Owe to their lubricious nature, these carbonous materials have attracted researchers to synthesize lightweight self-lubricating metal matrix nanocomposites with superior mechanical and tribological properties for several applications in automotive and aerospace industries. This review focuses on the recent development in mechanical and tribological behavior of self-lubricating metallic nanocomposites reinforced by carbonous nanomaterials such as CNT and graphene. The review includes development of self-lubricating nanocomposites, related issues in their processing, their characterization, and investigation of their tribological behavior. The results reveal that adding CNT and graphene to metals decreases both coefficient of friction and wear rate as well as increases the tensile strength. The mechanisms involved for the improved mechanical and tribological behavior is discussed.

Mechanical and tribological properties of self-lubricating metal matrix nanocomposites reinforced by carbon nanotubes (CNTs) and graphene – A review

Aluminum-7075 series alloys commonly used in transportation applications are aerospace, aviation, marine and automobile due to their good mechanical properties and low density and high strength-to-density ratio [1] . The present review focuses on mechanical properties, tribological properties and corrosion behavior of Al-7075 metal matrix composites (AMMCs) by the addition of desirable reinforcements. The objective is to review the literature on fabrication of the aluminum metal matrix composite materials by combining alloys and reinforcements. The reinforcements may be particulate SiC, Al2O3, Gr, TiO2, bagasse ash, etc. These particulate reinforcements are incorporated in the stir casting method. The results revealed that, there is significant improvement in mechanical properties. Superior wear and corrosion resistance, low coefficient of thermal expansion as compared to conventional base alloys.

Characterization of Al-7075 metal matrix composites: a review

Interest in natural fiber–reinforced composites (NFRCs) is increasing rapidly thanks to their numerous advantages such as low cost, biodegradability, eco-friendly nature, relatively good mechanical...

Natural fiber–reinforced composites: A review on material, manufacturing, and machinability:

Recent progress in aluminum metal matrix composites: A review on processing, mechanical and wear properties

Overview of wear performance of aluminium matrix composites reinforced with ceramic materials under the influence of controllable variables

This paper presents the wear behaviour of Al6061-T6 discontinuously reinforced with silicon carbide (SiC) and aluminium oxide (Al2O3) composite. The test specimens are prepared and tested as per ASTM standard. The experiments are conducted by using a pin on disc wear tester. Empirical relation is established to estimate the wear using statistical regression analysis and analysis of variance (ANOVA). The results indicated that the wear resistance of the 15% hybrid composite is better than that of the 5% composite. The fracture surface of composites shows the ductile tear ridges and cracked SiC and Al2O3 particles indicating both ductile and brittle fracture mechanism.

Analysis of dry sliding wear behaviour of Al6061/SiC/Al2O3 hybrid metal matrix composites

Dry Sliding Wear Behaviour of AA6061-T6 Reinforced SiC and Al2O3 Particulate Hybrid Composites

Natural fibre composites today are replacing synthetic fibre composites due to superior properties of natural fibres such as low density, high specific strength and modulus, relative no abrasiveness, ease of fibre surface modification, and wide availability .Drilling is often required to facilitate the assembly of the parts to get the final product. however, drilling composite materials present a number of problems such as delamination associated with the characteristics of the material and with the used cutting parameters .The present investigation is an attempt to study the factors and combination of factors that influence the delamination of drilled unidirectional jute fibre reinforced composites using taguchi, signal to noise ratio, Anova analysis and to achieve the conditions for minimum delamination.

K. Umanath

Papers

Analysis of dry sliding wear behaviour of Al6061/SiC/Al2O3 hybrid metal matrix composites

Dry Sliding Wear Behaviour of AA6061-T6 Reinforced SiC and Al2O3 Particulate Hybrid Composites

Delamination in Drilling of Natural Fibre Reinforced Polymer Composites Produced by Compression Moulding

Metal to Metal Worn Surface of AA6061 Hybrid Composites Casted by Stir Casting Method

Analysis of friction welding parameters on the mechanical metallurgical and chemical properties of AISI 1035 steel joints