About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Materials
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Presentation Title |
Powder Spreadability Measurements to Predict Performance in SLM Printers |
Author(s) |
Aurelien Neveu, Filip Francqui, Geoffroy Lumay, Naveen Tripathi, Olivier Rigo |
On-Site Speaker (Planned) |
Aurelien Neveu |
Abstract Scope |
Metallic powders are widely used in Additive Manufacturing (AM) processes, with for example Selective Laser Melting (SLM) and Selective Laser Sintering (SLS). In such operations, successive thin layers of powder are deposited with a ruler or with a rotating cylinder. The spreadability must be good enough to obtain homogenous successive powder layers leading to a good printer resolution. Four metallic powders (AlSi7Mg, Scallmaloy, Inconel, Inconel fine) performance has been studied. Powders spreadability has been determined with the GranuDrum instrument, a rotating drum enabling to quantify the influence of cohesion, shear-thinning/shear-thickening as well as thixotropic behavior, without applying a compressive load during the powder testing what fits with the conditions seen by powder in the AM processes. These measurements have been correlated to the powder performance in a SLM 3D printer, where a CCD camera is used to take several snapshots at different recoater speed (90, 140 and 240mm/s). |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |