About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Physical Modeling
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Presentation Title |
3D Transient Zone in Conduction and Keyhole Mode Melting in Laser Powder Bed Fusion Process |
Author(s) |
Santosh Kumar Rauniyar, Kevin Chou |
On-Site Speaker (Planned) |
Santosh Kumar Rauniyar |
Abstract Scope |
In the laser powder bed fusion (LPBF) process, laser travels in predefined scan paths in each layer of the layer by layer building process. There exists a transient regime at the start and at the end of the individual scans for any given value of power and scan speed. The melt pool geometry in the transient regime is different compared to the quasi-steady state in the middle region of the scans. The transient zone is prominent in the smaller scan lengths (e.g. 2 mm or less) since the track length may not be enough for the melt track to reach a quasi-steady state. In this study, the melt pool geometry in the transient zone of short scan lengths is analyzed for conduction and keyhole mode of melting. Discrete element method is used to generate a powder bed of Ti-6Al-4V particles and thermo-fluid simulation is performed in commercial software. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |