# Comprehensive Evaluation Method for High-Performance
## 3 Results and Discussion
### Evaluation Method Results
By conducting the experiment under accelerated wear conditions, it is possible to determine an extrapolated value of the material volume likely to be removed during the tool's life cycle. It is also worth noting that the presented evaluation method can be applied to other types of hard-to-machine materials. Furthermore, it can be expanded to include additional factors, such as vibration measurement or temperature in the cutting zone, depending on specific needs. An additional goal of this article was to compare the machining capabilities of Inconel 718 using two different machining methods, namely high-feed milling and plunge milling. Currently, there are no milling heads on the market with a low approach angle that allow for both plunge milling and high-feed milling. The milling head used to verify the evaluation method was custom-made. The evaluation results indicate that plunge milling using a low approach angle can be competitive compared to other rough milling methods for Inconel 718. Although four out of the top five results were achieved with the high-feed milling method, one set of plunge milling parameters ranked second among all machining trials. It is worth noting that the greatest advantage of this type of machining is the lower maximum F\({}_{\text{z}}\) force component during the cutting process. As indicated by the literature studies [40], reducing the value of this force can significantly impact the accuracy of the machine tool during its operation. In the conducted studies, the maximum F\({}_{\text{z}}\) force component for plunge milling was 25% lower than for high-feed milling. However, this did not result in a lower average power consumption across all machining cycles. Based on the obtained results, it can be observed that the depth of cut (a\({}_{\text{p}}\)), feed per tooth (f\({}_{\text{z}}\)), and milling type have a significant impact on energy consumption, tool wear, and cutting forces. As the depth of cut increases, both energy consumption and cutting forces rise, as greater depth requires more power to remove the material. For example, in high-feed milling, increasing the depth of cut from 0.5 mm to 1 mm leads to an approximately 30% increase in the average maximum power consumption. A higher feed per tooth results in greater energy consumption and increased cutting forces due to the larger amount of material being removed, while only slightly influencing the volume of material removed by the tool during its work cycle. In both high-feed milling and plunge milling, higher feed rates cause a significant increase in axial forces (F\({}_{\text{z}}\)), which directly affects the energy consumption of the machining process. Comparing the two milling methods, high-feed milling generally consumes more energy and leads to faster tool wear due to higher cutting forces and the larger volume of material being removed. On the other hand, plunge milling, though slower in terms of material removal, is characterized by lower cutting forces and reduced energy consumption, which can prolong tool life and reduce vibrations. In summary, increasing both the depth of cut and feed per tooth leads to higher energy consumption, faster tool wear, and greater cutting forces, with high-feed milling being more efficient for material removal but more demanding in terms of energy consumption and tool durability compared to plunge milling.