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 |
In Situ Melt Pool Measurements for Laser Powder Bed Fusion using Multi Sensing and Correlation Analysis |
Author(s) |
Rongxuan Wang, David Garcia, Rakesh Kamath, Chaoran Dou, Xiaohan Ma, Bo Shen, Choo Hahn, Kamel Fezzaa, Hang Z. Yu, Zhenyu Kong |
On-Site Speaker (Planned) |
Rongxuan Wang |
Abstract Scope |
Laser powder bed fusion still suffers from delamination and porosity due to the lack of understanding of melt pool dynamics. Both geometric and thermal sensing with high spatial and temporal resolutions are necessary to study the fundamental melt pool behavior. This work integrates three advanced sensing technologies: synchrotron X-ray imaging, high-speed IR camera, and high-spatial-resolution IR camera to characterize melt pool shape dynamics, keyhole, vapor plume, and thermal evolution in Ti-6Al-4V and 410 stainless steel spot melt cases. Quantifications on boundary velocities, melt pool dimensions, thermal gradients, and cooling rates are performed. The study discovers a strong correlation between the thermal and X-ray data, demonstrating the feasibility of using relatively cheap IR cameras to predict features that currently can only be captured using costly synchrotron X-ray imaging. Such correlation can be used for future thermal-based melt pool control and model validation. (MURI and AUSMURI Collaborative Research) |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Phase Transformations |