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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Defects and Properties of Cast Metals IV
Presentation Title Hybrid additive manufacturing of island grain bicrystals
Author(s) Logan G. Ware, Benjamin Herstein, Yuxuan Zhang, Hassina Bilheux, Zachary Cordero
On-Site Speaker (Planned) Logan G. Ware
Abstract Scope We report a hybrid additive manufacturing-based directional solidification technique which can fabricate tailored, three-dimensional crystal structures. This technique can manufacture single crystal, bicrystal, tricrystal, and higher-order oligocrystalline parts whose grain boundary networks are continuously varied and controlled by the part geometry. By designing the part geometry and controlling the contrast in thermal conductivity of the mold material and the metal/alloy, planar solidification fronts can be manipulated to form custom grain shapes and orientations. Polycrystalline parts with tailored grain boundary properties can be manufactured quickly by leveraging additive manufacturing for fast iteration and fabrication. We demonstrate this technique by growing a novel island grain bicrystal and measuring the energy of the grain boundary as a function of the grain boundary plane in a continuous manner. Applications of this technique to defect study are also briefly reviewed.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Solidification,


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