Analysis of surface quality for electrical discharge drilled inconely 718 super alloy by means of Taguchi approach Available to Purchase

Surface roughness is an inherit of any manufacturing process. It is a measure of the irregularities present on the structural surface after machining. Existing study is aimed to highlight the influence of input process parameters over surface roughness. Inconely 718, a nickel and chromium based super alloy offering great strength, resistance to corrosion and is very tricky to machine is elected as workpiece material. Copper is selected as the material for rotating tool electrode and additional grooves are provided in spiral manner so as to minimize machining period with improved processing. Peak current, pulse-on time, hole depth and tool diameter are taken in consideration as the input machining factors for Electrical discharge drilling. Taguchi L16 mixed-level concept is practiced for the experimental design. Analysis of variance is carried out in order to find out significant parameters that affect surface roughness. On the basis of ANOVA for the current experimental design, peak current, pulse on time also hole depth are concluded as the significant factors.