Effect of machining parameters on surface finish of Inconel 718 in end milling

Abstract

Abstract. Surface finish is an important criteria in machining process and selection of proper machining parameters is important to obtain good surface finish. In the present work effects of the machining parameters in end milling of Inconel 718 were investigated. Central composite design was used to design the total number of experiments. A Mathematical model for surface roughness has been developed using response surface methodology. In this study, the influence of cutting parameters such as cutting speed, feed rate and depth of cut on surface roughness was analyzed. The study includes individual effect of cutting parameters on surface roughness as well as their interaction. The analysis of variance (ANOVA) was employed to find the validity of the developed model. The results show that depth of cut mostly affected the surface roughness. It is also observed that surface roughness values are comparable in both dry and wet machining conditions.

Ceramic Cutting Materials and Tools Suitable for Machining High-Temperature Nickel-Based Alloys: A Review

“…Li et al [167] determined in their work the optimal cutting speed when processing Inconel 718, at which there are no diffusion phenomena that contribute to the formation of cuts on the back surface and craters on the front surface. Nalbant et al [168] studied the wear mechanisms of SiAlON tools when machining a nickel alloy with plates having different geometric shapes (RNGN 120700, and SNGN 120712). Practice has shown that the predominant failures of square plates are crater wear along the front surface and mechanical wear along the rear surface, while for round plates, it is the formation of notches and mechanical wear on the rear surface.…”

Influence of End Milling Process Variables on Material Removal Rate and Surface Roughness of Direct Metal Laser Sintered Inconel 718 Plate

“…For designing the end milling experiments, three factors, namely, spindle speed, feed rate, and depth of cut [20], were considered three levels of each factor. e experimental design and parameters for the end milling process are shown in Table 3.…”

“…Sarkar et al studied the impact of machining parameters concerning the end milling process and the response variables, such as surface finish to be measured in the Inconel 718 material. e results show that the cut's depth significantly influences the surface roughness measurement for the milling operation [20]. Shihab et al studied the optimization of the end milling process on the aluminum 7075 metal matrix composites.…”

Influence of Machining Parameters on Machinability of Inconel 718—A Review

“…The surface roughness grows with increasing the feed speed, but cutting depth has more influence on surface quality in comparison to feed rate. [ 85 ] Kiswanto et al [ 86 ] explored the influence of machining constraints on the surface roughness in micro‐milling of Inconel 718. The results explored that increasing the feed rate provided high surface roughness.…”