Investigation on Tribological and mechanical behaviour of AA6082—Graphene based composites with Ti particles

Abstract

In the recent years, high strength and low weight materials are being preferred in automobile sectors for fabricating high-speed rotating shafts and machineries. For satisfying dynamic requirements, Aluminium Metal Matrix Composites can be used. In this paper, an attempt has been made to fabricate AA 6082—graphene based Aluminium Matrix Composites reinforced with Titanium (Ti) particles. The effect of increase weight percentage of Graphene and Ti reinforcement on the mechanical characteristics was evaluated. Using tensile tests and surface micro hardness measurements, the fluctuations in mechanical aspects were measured. Tribological characteristics of the Aluminium Matrix Composites were found using pin on disc tribo wear meter, using Silver (Ag) nanoparticles incorporated Jatropha oil as bio-lubricant. Microstructural variations were evaluated by using FESEM which indicated surface tear offs, surface ploughing, demarcations, micro pits, grooves, demarcations, micro cuts and micro tears on the surfaces. The effect of Ag Nano particle addition on Jatropha oil was observed with the fluctuations in Coefficient of friction, specific wear rate and wear mass loss. On increase in reinforcement percentage of G and Ti, specific wear rate was found to decrease and coefficient of friction decreased till 3% by weight reinforcement and beyond 3%, it increased. The surface chemistry modifications were identified using XRD. It was observed that AA6082 Aluminium Matrix Composites reinforced with 3% G and 3% Ti exhibited better mechanical and tribological properties when used with 1% Ag Nanoparticles incorporated Jatropha oil as lubricant.

The Effect of Graphene Nanoplatelets Content on the Hardness of Mg6%Zn0.2%Mn Composites

“…Due to the hindrance in dislocation movement, the surface hardness increased at a high concentration of reinforcements. Rajaganapathy et al (2020) also found that adding graphene into AA6082 aluminium-based composites could increase the graphene from 1% to 5%, gained from 86HV to 107HV with an increment of 24.08%. However, the hardness of the composites is improved by the existence of a comparatively more rigid reinforcement.…”

Evaluation of the effect of silver nanoparticles on the tribological and thermophysical properties of bio-lubricants

“…Then, 3% weight of Graphene and 3% weight of titanium particles were preheated to 500 °C and were manually introduced into the molten AA6082 and stirred continuously with the help of a mechanical stirrer to get a homogeneous mixture. 43 The molten mixture was then poured into a mold and was allowed to solidify at room temperature. After the solidification process, the Pin samples were removed from the mold and were machined in a lathe to a standard cylindrical specimen with a diameter of 10 mm and a length of 30 mm as per ASTM standards.…”

“…Then, 3% weight of Graphene and 3% weight of titanium particles were preheated to 500 °C and were manually introduced into the molten AA6082 and stirred continuously with the help of a mechanical stirrer to get a homogeneous mixture. 43 The molten mixture was then poured into a mold and was allowed to solidify at room temperature.…”

Dry sliding wear response of aluminium matrix composites (AMCs): a critical review

“…The studies [34,[95][96][97][98] reported that the wear characteristics of the Al-based composites greatly rely on the class, geometry and architecture, and concentration of the reinforcing elements. In a statistical analysis of wear parameters, Suresh et al [99] stated that amongst all the wear parameters, wt% of reinforcement had the highest influence of around 29% on the wear properties of Al6063-based composites.…”