About this Abstract |
Meeting |
2024 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 III
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Presentation Title |
Key Hole Mode Hunting: Operando Tomographic Microscopy during Laser-based Powder Bed Fusion of Alumina |
Author(s) |
Malgorzata Makowska, Fabrizio Verga, Steven Van Petegem, Pablo Villanueva Perez, Zisheng Yao, Zhang Zhilang, Mamzi Afrasiabi , Federica Marone |
On-Site Speaker (Planned) |
Malgorzata Makowska |
Abstract Scope |
Structural integrity and properties of the Laser Powder Bed Fusion (LPBF) -manufactured ceramic parts depend on the melt pool behavior. Time-resolved 3D imaging of the molten phase volume using operando high-speed tomographic microscopy allowed for the observation of the melt pool dynamics. The experiments were conducted at the Tomcat beamline of the SLS (Paul Scherrer Institute) using an in-house built LPBF machine, which allows for laser scanning during high-speed rotation of the sample stage. The results showed that using increasing laser power results in a significant increase of the melt pool width, but not of its depth and no melt pool depression is observed, while according to the physical models developed for metals, the used laser parameters would lead to the keyhole mode. We will present the comparison with numerical simulations of the corresponding process, which provides a better understanding of the LPBF of ceramics. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Ceramics, Characterization |