About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Presentation Title |
Effects of Gas Flow Velocity in Laser Powder Bed Fusion Additively Manufactured Parts |
Author(s) |
Nathaniel W. Hall, Caleb Campbell, Bradley Jared, Shuchi Khurana, Thomas Spears, Petros Apostolou, Eduardo Miramontes |
On-Site Speaker (Planned) |
Nathaniel W. Hall |
Abstract Scope |
In the laser powder bed fusion process, the shielding gas serves as a means of removing oxygen and unwanted spatter particles. While a well-known process requirement, its reduction over space and time can be attributed to filter degradation and leads to undesirable defects in printed parts. Here, we measure gas flow velocity with an anemometer across the entirety of the build plate region on multiple occasions. We observed significant variation in velocity across the build plate and a substantial reduction in velocity magnitude over time while keeping machine parameters uniform. Pairing this data with multimodal in-situ data acquisition of the build process, we look to communicate the importance of monitoring gas flow velocity and to elucidate its relationship with part quality. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |