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 |
Enhancing Mass Transfer in LPBF: A Dive into Oscillating Laser Scan Strategies and Melt Pool Dynamics |
Author(s) |
Ioannis Bitharas, Kyle Perkins, Diego Della Crociata, Adam Clare, Marco Simonelli, Andrew Moore |
On-Site Speaker (Planned) |
Ioannis Bitharas |
Abstract Scope |
The productivity-to-cost ratio of Laser Powder Bed Fusion (LPBF) machines presents a challenge to the widespread implementation of this technique in high-volume manufacturing. This study explores advanced laser scan strategies, such as oscillating scanning, with the objective of enhancing mass transfer to the melt pool. We employ long-standoff microscopy and schlieren imaging to visualise melt pool dynamics, and how they relate to plume and particle behaviour. These insights aid in interpreting time-integrated fluence maps and calibrating heat sources in semi-analytical thermal models, facilitating optimal parameter selection. We further employ imaging to characterise the evolution of these dynamics throughout the fabrication of SS316 cubes. A metallurgical analysis of the printed samples is conducted, enabling us to identify distinct microstructures and quantify porosity levels. By integrating these results, we offer conclusions regarding the heat and mass transfer efficacy of oscillating scanning, demonstrating its potential to improve mass transfer in LPBF processes. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Process Technology |