Tool wear and wear progression of uncoated carbide in turning titanium alloy Ti-6AI-4V ELI under vegetable oil based carbon nanofiber

Jahari, Nor Hidayah (2017) Tool wear and wear progression of uncoated carbide in turning titanium alloy Ti-6AI-4V ELI under vegetable oil based carbon nanofiber. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Titanium alloy is mostly known have good corrosion resistance, high specific strength and also biocompatibility. Because of the titanium alloy capabilities, it caused titanium alloy is difficult to machined, produce high cutting temperature at cutting zone during machining and shorter life of cutting tool. To overcome this problem, before this many type of coolants has been proposed and including to vegetable oil based nanofluid. Vegetable oil that mixed with carbon nano tube is widely researched before and there is no research about carbon nano fiber. By using the proposed coolant, the tool life and wear progression is being observed during machining. Titanium alloy Ti-6AI-4V ELI is used as workpiece, uncoated carbide insert as cutting tool. Tool maker and stereo microscope are used to check and record the reading of tool wear. Design of Expert is used to determine the total experiment need to be run and ANOVA analysis is used to analyse the results. The cutting parameter that is being highlighted is cutting speed, feed rate and depth of cut. Cutting speed used is 100 m/min, 120 m/min and 140 m/min, the feed rate used is 0.15 mm/rev, 0.17 mm/rev and 0.20 mm/rev while, the depth of cut is constant with 0.35 mm. At the end, from the ANOVA analysis also the mathematical model can be develop and the error between theory and actual can be identified. ANOVA analysis also shows the most contribution to the results is cutting speed rather than feed rate. Cutting speed is 100 m/min and feed rate is 0.15 mm/rev can give the optimum tool life with 62.78 minutes. From the results, it shows that, if the cutting speed and feed rate high, the cutting tool life is short. While, the low feed rate and cutting speed will produced longer tool life.

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