Additive and Subtractive Manufacturing of Inconel 718 Components - Estimation of Time, Costs and Carbon Dioxide Emission – Case Study

The article presents the cost analysis of three techniques that can be used to produce a cylindrical part from Inconel 718 nickel alloy. First of them allows the part to be shaped by additive manufacturing (AM). In the second technique the shape is obtained by forging. Both techniques require the use of machining to give the final dimensional and shape accuracy of the manufactured part. The third technique is based solely on machining operations. Research has shown that the most expensive technique for high-volume production is SLM/LMF. Based on the case study, it can be concluded that after a year of production using the SLM/LMF, forging and machining methods, the carbon dioxide emission is the biggest in the additive manufacturing. Optimizing the Ra and F c parameters causes differences in carbon dioxide emissions. The turning process including machining optimization due to F c characterizes a higher ability to produce parts than optimization due to roughness parameter Ra.