As technology constantly develops and changes, production methods are constantly being renewed to produce faster, easier, more complex, and more durable products. It has started to be used widely in recent years, especially in the aviation, space, health, defense, and automobile industries. Titanium and its alloys, one of the most used materials in the aviation industry, provide great advantages as they exhibit high strength, low density, and good corrosion resistance. However, they pose a disadvantage in terms of their workability and weight. Ti6Al4V alloys produced by the EBM method have high strength, good corrosion resistance, good thermal properties, uniform microstructure, good dimensional tolerances, and low microcracking susceptibility. Laying direction is important in production with EBM. In this study, production was made in 0°, 60° and 90° laying directions. Especially in production with EBM, 0° laying direction; It ensures that the part has a high strength and homogeneous structure. 60° laying direction is preferred in cross-sections of the part produced with EBM or in areas requiring high strength. This situation; can provide good strength, uniformity, and access to the interior. The 90° laying direction produced with EBM is; Horizontal laying direction negatively affects thermal behavior and surface quality. This causes thermal stresses to increase during the process and possible defects to occur on the surface of the part. In the experimental study, after the drilling of the pilot holes was completed, a new cutting tool was used in each laying direction to increase the hole diameters to 4.76. In the hole diameter enlargement process, 30° helix and 135° tip angle for 90° laying direction gave the best results. For 60° laying direction, 20° helix 135° gave the best result. No progress was made at the 30° helix 135° tip angle. For 0° laying direction; 20° helix and 135° tip angle gave the best results. The operations were repeated for all laying directions with new cutting tools to increase the hole diameter from 4.76 mm to 6 mm. The worst result was given at a 30° helix and 118° tip angle. In the fourth second of the operation, the team was broken. The final hole enlargement process with reamers could only be done for the holes where the previous processes were completed. Therefore, a straight reamer for 90° and 60°, and one shot reamer for 0° gave the best results. ORCID NO: 0000-0001-7076-77661, 0009-0009-9480-7801
Anahtar Kelimeler: EBM Method, TÝ6AL4V Alloy, Tribological Properties, Drill Geometry, Machinability, Dimensional Tolerance,
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