About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Presentation Title |
Functional Gradients in the Ti-Ta-Nb System |
Author(s) |
Jennifer Glerum, Benjamin Ellyson, Raiyan Seede, Michael Juhasz, Brandon Bocklund, Nicholas Ury, Aurelien Perron, Kaila Bertsch |
On-Site Speaker (Planned) |
Jennifer Glerum |
Abstract Scope |
Additive manufacturing (AM) of functionally graded materials (FGMs) is of interest for joining dissimilar metals to enable novel ways of optimizing material response. FGMs of lightweight, structural alloys to high-melting temperature refractory alloys are of particular interest for aerospace, fusion, and defense applications. In this work, a framework for optimizing process parameters to produce fully-dense FGMs by directed energy deposition (DED) is explored in the Ti-Ta-Nb ternary alloy system. Single tracks of Ti, Ta, and Nb are analyzed for melt pool dimensions and extent of mixing with the substrate as a function of process parameters, and binary elemental blends/gradients are evaluated to develop a formulaic approach for fabricating FGMs. The microstructure and compositions are compared to equilibrium Calphad-based modeling predictions, demonstrating that the non-equilibrium conditions in DED play a significant role in microstructure evolution. Finally, mechanical properties of these gradients are evaluated to provide insights into their future applications.
This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.LLNL IM release number: LLNL-ABS-863175 |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |