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Electrical discharge machining (EDM) of Inconel 718 by using copper electrode at higher peak current and pulse duration

Ahmad, Said and Lajis, Mohd Amri (2013) Electrical discharge machining (EDM) of Inconel 718 by using copper electrode at higher peak current and pulse duration. In: International Conference on Mechanical Engineering Research (ICMER2013), 1-3 July 2013, Kuantan, Pahang. (Unpublished)

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Abstract

This experimental works is an attempt to investigate the performance of Copper electrode when EDM of Nickel Based Super Alloy, Inconel 718 at higher peak current and pulse duration. Peak current, Ip and pulse duration (pulse on-time), ton are selected as the most important electrical pulse parameters. In addition, their influence on material removal rate (MRR), electrode wear rate (EWR), and surface roughness (Ra) are experimentally investigated. The ranges of 10 mm diameter of Copper electrode are used to EDM of Inconel 718. After the experiments, MRR, EWR, and Ra of the machined surfaces need to be measured in order to evaluate the performance of the EDM process. In order to obtain high MRR, higher peak current in range of 20A to 40A and pulse duration in range of 200μs to 400μs were used. Experimental results have shown that machining at a highest peak current used of 40A and the lowest pulse duration of 200μs used for the experiment yields the highest material removal rate (MRR) with value 34.94 mm3/min, whereas machining at a peak current of 20A and pulse duration of 400μs yields the lowest electrode wear rate (EWR) with value -0.0101 mm3/min. The lowest surface roughness (Ra) is 8.53 μm achieved at a lowest peak current used of 20A and pulse duration of 200μs.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: electrical discharge machining (EDM); Inconel 718; aerospace material; material removal rate (MRR); electrode wear rate (EWR); surface roughness (Ra)
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ1125-1345 Machine shops and machine shop practice
Depositing User: Normajihan Abd. Rahman
Date Deposited: 14 Aug 2018 01:32
Last Modified: 14 Aug 2018 01:32
URI: http://eprints.uthm.edu.my/id/eprint/4073
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