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 |
Spatially Resolved Real-time Crystallization Kinetics during Extrusion-based 3D Printing of Semicrystalline Polymers |
Author(s) |
Hilmar Koerner |
On-Site Speaker (Planned) |
Hilmar Koerner |
Abstract Scope |
Additive manufacturing of high-performance polymers enables light-weighting and complexity enabled capabilities for aerospace applications. The coupling of processing parameters to morphological evolution and resulting heterogeneities in material properties and their effects on mechanical performance still lacks detailed understanding. Degree of crystallinity and heterogeneities thereof between roads and layers lead to weak mechanical performance. Real-time monitoring techniques, such as synchrotron X-ray scattering experiments, shed light on the evolution of crystallite size, alignment, and crystallinity. In this work, real-time microbeam X-ray scattering captures temporally and spatially resolved crystallinity, crystallization kinetics and polymer alignment during the 3D printing process using an industrial printhead on a multi-axis table. Real-time snapshots over several seconds along the heated build platform and throughout the height of the printed roads offer unique 2D maps of heterogeneous crystallization kinetics and polymer morphology at interfaces. These results can be used in predictive modeling tools and to further optimize printing parameters. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Polymers, Characterization |