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Meeting 2024 TMS Annual Meeting & Exhibition
Symposium Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques III
Presentation Title Effect of Ultrasound Melt Treatment in Additive Manufacturing Environment: An In Situ Synchrotron X-ray Diffraction Analysis
Author(s) Tianzhao Wang, Benjamin Schneiderman, Samuel Clark, Andrew Chihpin Chuang, Zhenzhen Yu, Xun Liu
On-Site Speaker (Planned) Tianzhao Wang
Abstract Scope This study examines the effect of ultrasonic melt treatment (UST) in an additive manufacturing (AM) environment by utilizing in situ synchrotron X-ray diffraction (SXRD) and postmortem electron backscatter diffraction (EBSD) techniques. A UST module that is compatible with laser-based AM replicator is developed to simulate the UST-AM process. High-speed SXRD is used to capture the temperature and microstructure evolutions during the solidification under 40kHz ultrasonic vibrations. The static SXRD diffraction patterns in the UST-treated sample exhibit higher continuities of diffraction rings, indicating a more refined grain structure. Thermal histories determined from the in-situ lattice parameter evolution demonstrate an increased cooling rate with UST. The EBSD analysis reveals that the UST sample exhibits a refined equiaxed grain structure and more low angle grain boundaries along the weld centerline. This research provides the potential of in situ SXRD as a technique for understanding the underlying mechanisms of UST effect during AM process.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Characterization, Aluminum

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