About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques
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Presentation Title |
The Influence of Laser Modulation on Melt Pool Behavior in Laser Powder Bed Fusion Probed with In-situ X-ray Imaging |
Author(s) |
Nicholas Calta, Aiden Martin, Joshua Hammons, Michael Nielsen, Manyalibo Matthews, Trevor Willey, Jonathan Lee |
On-Site Speaker (Planned) |
Nicholas Calta |
Abstract Scope |
Temporal modulation of the laser heat source is used as an adjustable process variable in some commercially available laser powder bed fusion additive manufacturing systems. While a great deal is known regarding the melt pool fluid dynamics under continuous wave melting conditions, the relationship between this body of knowledge and laser processing under pulsed beam conditions is less clear. Here we use high speed X-ray imaging to understand the fluid dynamics of a laser powder bed fusion melt pool that arise from temporal modulation of the laser, with a particular focus on instabilities in the melt that can lead to pore formation.Prepared by LLNL under Contract DE-AC52-07NA27344. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |