About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing of Metals: Applications of Solidification Fundamentals
|
Presentation Title |
In-situ X-ray Characterization for Additive Manufacturing of Inoculants-treated Aluminum Alloy |
Author(s) |
Sen Liu, Vivek Thampy, Peiyu Quan, Christopher Tassone |
On-Site Speaker (Planned) |
Sen Liu |
Abstract Scope |
Additive manufacturing of densified and defect-free Aluminum (Al) alloy faces many challenges because of its low laser absorption, high thermal conductivity, and fast cooling rate; most Al alloys are defined as highly crack sensitive with poor printability. Inoculation treatment offers a chance to solve this problem, where the inoculants are mixed into molten metals and act as heterogeneous nucleation catalysts during solidification. Equiaxed grains accommodate the solidification shrinkage allowing the production of defect-free samples. For the first time, this work will present the results of in-situ X-ray diffraction and imaging of inoculants-refined and unrefined Al6061 alloy printing at Stanford synchrotron radiation lightsource. The high-speed X-ray diffraction extracts subsurface phase transition and cooling rates from melted to solidified track. The X-ray radiography reveals the pore formation and fluid dynamics mechanism during laser melting. The effects of processing parameters and constituted composition on the phase transition and molten pool characteristics are analyzed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Characterization |