| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
Fabrication Defects and Limitations in Additive Manufacturing of AlSi10Mg Lattice Structures |
| Author(s) |
Enrico Ossola, Andre Pate, Samad Firdosy, Andrew A. Shapiro, Scott Roberts, Eugenio Brusa, Raffaella Sesana |
| On-Site Speaker (Planned) |
Enrico Ossola |
| Abstract Scope |
Additive Manufacturing has enabled the production of lattice structures with tailored mechanical properties. However, process limitations still exist, affecting the quality of the struts, practically limiting sizes and types of printable unit cells. Typically, long thin unsupported horizontal struts exhibit large deviations from ideal geometries, due to high surface roughness and internal porosity. AlSi10Mg specimens were designed and fabricated by Direct Metal Laser Sintering, considering different strut orientations, sizes and overhang lengths and using different sets of process parameters. Visual inspection, 3D scanning and microscopy inspection of the cross sections have been performed. A quality control procedure based on dimensional and geometric tolerances has been defined in order to characterize the quality of the struts. The best process parameters have been selected and used to fabricate specimens for compression tests. Finally, results of strut quality control have been used to calibrate the FEM model and replicate the experimental results. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |