On optimization of process parameters of Inconel-718 machining for green production.

Inconel 718 is designed for high tensile and yield strength and can sustain its properties under high or low temperatures. These properties make it suitable for industries like, turbines manufacturers, aviation industry and nuclear power plants. However, it is categorized as difficult to cut material, as such materials possess behavior of ductility, work hardening and production of enormous heat and abrasion during machining. This makes the machinability of Inconel 718 a challenging trade as dimensional accuracy is difficult to achieve. This result in wastage of material, more power consumption and resources required. To explore the machinability and cater the green manufacturing issues of Inconel 718, in this study, the surface roughness (Ra) of sculptured surface is analyzed. For detail and robust analysis, experiments were performed under dry and wet conditions. For both conditions, coated solid carbide ball end mill were used in CNC milling. Effect of cutting parameters like cutting speed, depth of cut and feed were studied using Taguchi techniques for enhanced surface finish. Analysis of variance (ANOVA) was also performed to determine the significant factor that affects surface finish. Regression analysis were performed and surface finish models were developed to estimate the surface finish prior to machining. This study is not only valuable for better-quality machining of Inconel 718 (curved surfaces) but also for its process and environmental sustainability. [ABSTRACT FROM AUTHOR]