EXPERIMENTAL INVESTIGATION OF MICRO-EDM OPERATION IN INCONEL 718

Mayank Choubey and K. P. Maity
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Mayank Choubey: Department of Mechanical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha 769008, India
K. P. Maity: Department of Mechanical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha 769008, India

Surface Review and Letters (SRL), 2021, vol. 28, issue 11, 1-8

Abstract: The increasing trends towards miniaturized and lightweight components for various engineering and aerospace applications by unconventional machining the demand for micro-electrical discharge machining (EDM) have become increasingly wide. Micro-EDM is one of the most promising unconventional machining processes as compared to other unconventional machining due to its lower cost, ease of operation, and accuracy. This research explores the experimental investigation of micro-EDM operation on hard and difficult to machine material Inconel 718. The micro-holes were fabricated on an Inconel 718 workpiece with a copper electrode. The influence of input process parameters on material removal rate (MRR), machining time, and quality of the fabricated micro-holes were studied. Overcut and taperness of the fabricated micro-sized through holes were measured to address the accuracy of the fabricated micro-holes in micro-EDM operation. Experimental results reveal that the increase in current and voltage increases the MRR, and reduced machining time but at the cost of dimensional accuracy of the fabricated holes. The high value of current and voltage resulted in poor surface quality. The optimum machining condition that gives higher MRR with higher machining precision was obtained by experimenting while machining Inconel 718.

Keywords: Micro-EDM operation; Inconel 718; machining performance (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X2150102X

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