Analysis of Dimensional Accuracy (Over Cut) and Surface Quality (Roughness) in Electrical Discharge Machining of Inconel-718 Alloy

Abstract:

Inconel-718 is a nickel based super alloy (difficult-to-cut material) used in aerospace industry. Analysis of machining performances viz. Over Cut (OC) & Surface Roughness (SR) for Inconel-718 through rotary Cu-pin tool electrode have been carried out. Peak current (I_p), pulse-on time (T_on), tool rotation (N_t) & hole depth (h) were used as input factors in Electrical Discharge Drilling (EDD) of Inconel-718 work-piece. Effect of input parameters on performance characteristics like OC & SR were found by Taguchi’s L₉ (3⁴) orthogonal array. It is reveals that I_p & h are most affecting factors that affects OC & SR. The Scanning Electron Microscope image was used to measure diameter of hole on work-piece after machining.

• Periodical: Materials Science Forum (Volume 969)
• Pages: 644-649
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.969.644
• Online since: August 2019
• Authors: Rakesh Kumar*, Anand Pandey, Pooja Sharma
• Keywords: EDM, Inconel 718, OC, Surface Roughness, Taguchi

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