Drilling Of Titanium Alloy Using Hybrid Nanofluid Coolant

Heng, Benny Ek Ming (2019) Drilling Of Titanium Alloy Using Hybrid Nanofluid Coolant. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This research focused on the effect of different concentrations of the hybridization between graphene and multiwall carbon nanotubes (MWCNTs) with deionized water as a coolant for the drilling of titanium alloy. Surface roughness, burr formation and thrust force of drilled holes against the volume concentration of hybrid nanofluid was studied. The thermal characteristics of hybrid nanofluid such as thermal conductivity and viscosity were investigated as well. The hybrid nanofluid was prepared by applying two step method which is firstly mixing both the graphene and MWCNTs nanoparticles and after that mixing both the mixture with deionized water and further stirring by ultrasonication process using ultrasonic homogenizer. The machining parameters that were used in this research are feed rate (0.09 mm/rev), cutting speed (20 m/min), depth of cut (5 mm) followed by four different concentrations of the graphene and MWCNTs hybrid nanofluid mixture which were 0.0wt%, 0.1wt%, 0.5wt% and 1.0wt%. The experiment results showed the combination of both graphene and MWCNTs nanoparticles have produced a hybrid nanofluid with enhanced thermal conductivity and also its viscosity. At optimum concentration of 0.5wt%, it can be observed the value of both thrust force and surface roughness were at the lowest reading compared to other concentrations. This concentration also produced the lowest height of uniform burr formation at exit of the hole

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