About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Advancing the Frontier of Powder Materials Processing and Sintering: A MPMD/EPD Symposium in Honor of Eugene Olevsky
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| Presentation Title |
Effect of layer thickness on the spreading of non-spherical powder in laser powder bed fusion |
| Author(s) |
Aniruddha Das, Jesse Redford, Eric Whitenton |
| On-Site Speaker (Planned) |
Aniruddha Das |
| Abstract Scope |
Layer thickness can influence powder spreading in the laser powder bed fusion (LPBF) process. This parameter contributes significantly to the speed of the process. The spreading behavior of non-spherical powder is of interest since it is significantly cheaper than its spherical counterpart. Irregular-shaped water atomized SS316L and spherical-shaped gas atomized SS316L were spread at several layer thicknesses using the powder spreading testbed (PST) at NIST. Powder packing densities of the spread powder were measured. Recent upgrades to the PST now allow a moving camera looking through the side to collect the video of the entire spreading process. The dynamic angle of repose was collected, and particle tracking was also conducted for the collected video data using particle image velocimetry. The velocity of particles underneath the recoater blade was measured for each condition. Finally, the evolving powder flow patterns from particle tracking were analyzed to explain the obtained results. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Powder Materials, Characterization |