About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing of Metals: Applications of Solidification Fundamentals
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Presentation Title |
Operando Tomography during Laser-based Powder Bed Fusion - Towards 4D Imaging of Melt Pool Dynamics |
Author(s) |
Malgorzata Makowska |
On-Site Speaker (Planned) |
Malgorzata Makowska |
Abstract Scope |
Optimization of the properties of Laser Powder Bed Fusion (LPBF) -manufactured ceramic parts requires an insight into formation mechanisms of structural defects. The results of the first operando tomographic microscopy during LPBF of ceramics, using an in-house built LPBF setup at the Tomcat beamline of SLS (Paul Scherrer Institute) will be presented. The 3D imaging experiments were performed using a high speed tomography setup and a miniaturized LBPF machine allowing for the laser scanning during high-speed rotation of the sample stage. Time-resolved 3D imaging with acquisition rate of 100 tomograms per second provided direct insight into the phenomena not accessible in 3D with other techniques, in particular, the melt pool dynamics, crack and porosity formation mechanisms. The achieved information provides understanding of underlying processes, but is also crucial for the development and verification of models used for the LPBF process simulations, which can be extended to other materials. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Ceramics, |