Tool performance of uncoated tungsten carbide insert during turning Ti-6AI-4V under dry and nanofluid condition

Shafi'e, Muhammad Yusri (2017) Tool performance of uncoated tungsten carbide insert during turning Ti-6AI-4V under dry and nanofluid condition. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The meaning of tool life is assumed as the cutting time that is needed for a tool to reach its tool life criterion. In this study, uncoated tungsten carbide inserts, (CNGG 120408-SGF H13A) were applied in turning workpiece titanium alloy, Ti-6AL-4V ELI (extra low interstitial). Titanium alloys have been applied widely in many applications especially in aerospace, automotive, medical and chemical industry. This is because high strength to weight ratio, high fracture resistance, and excellent corrosion resistance of titanium alloy. However, titanium alloys are difficult to machine materials even though at elevated temperatures. It has low thermal conductivity, low elastic modulus and easy to react chemically with the cutting tools material. The objective of this research was to investigate the tool performance of uncoated tungsten carbide in turning Ti-6AL-4V ELI under dry and nanofluid condition. Experimental design of this study based on Factorial method. Two Level Factorial design was designated to arrange the cutting parameters of cutting speed with range of 100 to 140 m/min, feed rate with 0.15 to 0.20 mm/rev, and depth of cut is constant (0.35 mm). Flank wear progression was measured using an optical microscope. The values were recorded for each 20 mm on the workpiece until flank wear (Vb) reached the tool life criterion followed by (International Standard ISO 3685). From the results, maximum tool life (62.82 minutes) obtained by cutting speed of 100 m/min and feed rate of 0.15 mm/rev under nanofluid machining.

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