Fig nbsp xA FESEM micrographs and EDS spectrum of
Fig. 1. Schematic of the testing rig for measuring the fracture resistance of the tools.Figure optionsDownload full-size imageDownload high-quality image (35 K)Download as PowerPoint slide
The cutting performance of the end mills was evaluated via dry cutting on BIIB021 Five-axis Machining Center (DMU 80 mono BLOCK). Aluminum alloys (6063 DL31) with a size of 105 mm × 35 mm × 40 mm were used as the workpiece materials. Before the cutting tests, the workpieces were polished precisely to a level of surface roughness of approximately 3.0 μm. The speed of the spindle and the feeding was 1500 r/min and 22 mm/min, respectively. The depth of cut was 0.1 mm, and the cutting velocity was kept constant at 1100 m/min. After cutting, a species richness Keyence 3D Laser Scanning Electron Microscope was used to observe the cutting edges of the tools and the cutting surfaces of the workpieces. For comparison, the cutting tests were performed under identical conditions using the commercial uncoated tools and the bi-layer (SiC + diamond) coated tools.