Investigation on Mechanical Tribological and Machining behaviour of Graphen C and Zirconia ZrO2 reinforced AA6061 Hybrid Nano Composites

Abstract

This research work investigates the mechanical and wear behaviour of newlinegraphene and zirconium di-oxide (ZrO2) reinforced Aluminium alloy 6061 hybrid newlinenano composites (AMMHNCs) fabricated by ultrasonic assisted stir casting newlinemethod. Graphene and ZrO2 are selected as reinforcements for increasing the newlinewear resistance and hardness of the base alloy AA6061. The aim of the newlineresearch was to analyse the effect of graphene and ZrO2 reinforcements on newlinemechanical and tribological properties of AA6061. There are 5 different newlinemixtures were used for this research. Those mixing proportions of graphene newlineand ZrO2 reinforced with AA6061 in weight are 100% AA6061 / 0% Graphene / newline0% ZrO2, 98.5% AA6061 / 0.5% Graphene / 1% ZrO2, 97.5% AA6061 / 0.5% newlineGraphene / 2% ZrO2, 98% AA6061 / 1% Graphene / 1% ZrO2, 97% AA6061 / newline1% Graphene / 2% ZrO2. Microstructural study was carried out using optical and scanning newlineelectron microscopic images to analyse the uniform dispersion of newlinereinforcements in AA6061. The hardness, tensile, impact and wear test were newlinecarried out with ASTM standards to analyse the properties in the proposed newlinecomposite specimens. It was observed that, the hardness, tensile, impact newlineincreases by 21.88%, 69.42%, 78.57% and percentage elongation is newlinedecreased by 63.52% with the increase of reinforcements. Wear resistance newlineincreases with the increase of reinforcements. ANN and ANFIS models were newlineused for predicting the wear rate for experimented and non-experimented newlineparameters. ANFIS model predicted with accuracy of R2 with 99.9%. The newlinemachining behaviour was analysed using drilling operation in CNC vertical newlinemilling centre. The input parameters used was feed-rate and cutting speed. The newlineoutput variables considered was thrust force and surface roughness. The newlinematerial with reinforcement of 1% Gr and 1% of ZrO2, carbide drill with cutting newlinespeed of 38 m/min and feedrate of 50 mm/min is suitable for drilling operation newlinein order to achieve minimal thrust force. The material reinforced with 1% Gr and newline2% ZrO2 when drilled by HSS-M