About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
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Presentation Title |
Direct Ink Writing and Sintering of Micro-Lattices with Multi-Principal Element Alloys with High Specific Mechanical Properties |
Author(s) |
David C. Dunand, Dingchang Zhang , Ming Chen, Ya-Chu Hsu |
On-Site Speaker (Planned) |
David C. Dunand |
Abstract Scope |
We use 3D direct ink writing to create lightweight micro-lattices with several multi-principal element alloys compositions - CoCuFeNi, HfNbTaTiZr, (Zr0.50Ti0.35Nb0.15)80Al20, and Al8Co25Cr7Fe15Ni36Ti9 - enabling scalable manufacturing of complex geometries with superior strength and ductility at ambient and high temperatures. Blends of elemental, oxide, or hydride powders are suspended together with binder into an ink which is 3D-extruded into thin struts, in air and at ambient temperature. Printed green bodies are heat-treated using various strategies (e.g., carbon reduction, dehydrogenation, or solid-state sintering) to densify the powders within the microlattice struts and achieve desirable phases. We discuss various approaches in case studies to mitigate oxidation and impurities issues during heat treatments. We also describe the effects of processing on microstructures and associated mechanical properties, including compressive strength and ductility of microlattices from 25 to 1000 ⁰C. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Powder Materials, High-Temperature Materials |