Table 4 Sample description, including process and CT scan parameters
a). Part description | |||
Material | Ti6Al4V | Ti6Al4V | PLA |
Geometry | Flat dog-bone | Solid cylinder | Solid cylinder |
Specimen dimension | 3 mm thickness, 6 mm width | 0.2, 0.6, 1.0 mm diameter | 1.0, 1.5, 2.0 mm diameter |
Build inclination angles (α) | 50°, 70°, 90° | 30°, 60°, 90° | 0°, 30°, 45°, 60°, 75°, 90° |
b). Process description | |||
Process | PBF | PBF | MEX |
Machine | SLM Solutions 250 | SLM Solutions 250 | Flashforge Dreamer (0.4 mm dia. nozzle) |
Layer height | 30 µm nominal layer height | 30 µm nominal layer height | 0.32 mm layer thickness |
Input material | Powder with Dv(90)* = 53.9 µm | Powder with Dv(90)* = 53.9 µm | Filament diameter 1.75 mm |
c). CT parameters | |||
Scanner | GE Phoenix v-tome-x s240 | Bruker Skyscan 1275 | Bruker Skyscan 1275 |
Voltage | 180 kV | 100 kV | 35 kV |
Current | 60 µA | 100 µA | 212 |
Rotation step | 0.1° | 0.2° | 0.2° |
Filter | No filter | 1 mm Al | No filter |
Voxel size/resolution | 5 and 10 µm | 7 µm | 8 µm |
Reconstruction algorithm | VGStudio MAX 3.0 | Nrecon | Nrecon |
Additional roughness measurement | Alicona | N/A | N/A |