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-26: High Speed X-ray Diffraction |
Author(s) |
Niranjan Parab, Seunghee Oh, Joseph Aroh, Joseph Pauza, Sidi Feng, Rachel Lim, Christopher Kantzos, Robert Suter, Chihpin Andrew Chuang, Cang Zhao, Tao Sun, Anthony D. Rollett |
On-Site Speaker (Planned) |
Seunghee Oh |
Abstract Scope |
Recent developments in additive manufacturing (AM) allow extremely complex parts to be produced that are not attainable with traditional techniques. Using a set-up similar to that used to observe particle dynamics during laser melting, an in situ high-speed high-energy synchrotron X-ray dynamic diffraction technique at the 1-ID beamline at the Advanced Photon Source allows us to monitor diffraction patterns at high-speed frame rate, of order 250 Hz. This technique allows us to quantify transient behaviors including phase transformations, thermal effects and microstructural evolution during the laser melting and re-solidification of metals. A 500 W fiber-laser beam coupled with a scan head was used to produce micro-weld beads. Temperature can be inferred via thermal expansion. Residual strain development appears as peak broadening. Unexpected precipitation behavior has been observed in, e.g., IN 718. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |