About this Abstract |
Meeting |
2020 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
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Presentation Title |
A-20: Accessing Nano-scale Structure and Dynamics During 3D-Printing by Operando X-Ray Photon Correlation Spectroscopy |
Author(s) |
Maria Torres Arango, Yugang Zhang, Gregory Doerk, Ruipeng Li, Chonghang Zhao, Yu-chen Karen Chen-Wiegart, Andrei Fluerasu, Lutz Wiegart |
On-Site Speaker (Planned) |
Maria Torres Arango |
Abstract Scope |
Despite the increasing interest in printing technologies for additive manufacturing (AM), important challenges remain, mainly associated with the printing method’s inherent anisotropy, out-of-equilibrium processing stages (extrusion and subsequent relaxation), and material-specific contributions. Therefore, accessing the nano-scale dynamics and structural evolution during printing is key for understanding fundamental processing-properties relationships, affecting the materials self-assembly, defect formation/propagation, and ultimately performance in devices/components.
We conduct operando x-ray photon correlation spectroscopy (XPCS) studies during 3D-printing, at the Coherent Hard X-Ray (CHX) 11-ID beamline, National Synchrotron Light Source II. We investigate the nano-scale spatio-temporal evolution during the out-of-equilibrium stages of extrusion-based direct ink writing of viscoelastic colloidal systems, exploring different formulations and contributions of shape retention mechanisms to the printing process.
We expect our investigations to shed light on the material’s geometric fidelity and self-assembly characteristics, contributing to the theoretical understanding and modelling of AM processes, and opening opportunities for engineering materials with novel properties. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |