Electrical Discharge Machining Of AISI 304 Stainless Steel Using Mixture Of Deionized Water And Carbon Nanofiber With Surfactant

Ahmad Fashli Afif, Abdul Hamid (2015) Electrical Discharge Machining Of AISI 304 Stainless Steel Using Mixture Of Deionized Water And Carbon Nanofiber With Surfactant. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This project mainly focused on the effect of surfactant towards the machining characteristics (material removal rate, electrode wear rate and surface roughness) of Electrical Discharge Machining of AISI 304 stainless steel using mixture of deionized water and carbon nanofiber with surfactant as dielectric fluid. Two types of surfactant namely Gum Arabic (GA) and PolyVinylPyrrolidone (PVP) were used. The experimental results show that the addition of surfactant can prevent the agglomeration of carbon nanofiber in the dielectric fluid, and improve the efficiency of machining and thus, increase the material removal rate. The electrode wear however, increase as the concentration of PVP surfactant increased in the dielectric fluid, but decreases as the concentration of GA surfactant increased. The results also shows that GA is a better surfactant compared to PVP since it is more stable and ensure the optimum dispersion of carbon nanofiber in the dielectric fluid. When GA was used as surfactant, the material removal rate improved up to 70-80% compared to when PVP was used in the dielectric fluid. The surface roughness however shows some irregularities. The surface roughness for mixture using both GA and PVP was highest at concentration of carbon nanofiber to surfactant of 1:1, but it decreases at concentration 1:2. The surface roughness then increased at concentration of 1:3. The lowest surface roughness obtained from the mixture of carbon nanofiber and GA at concentration of 1:2.

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