About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Physical Modeling
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Presentation Title |
Cellular Automata Modeling of Layer-wise Microstructure Convergence as Functions of Material and Processing Variables |
Author(s) |
Matthew Rolchigo, Robert Carson, Gerald Knapp, John Coleman, James Belak |
On-Site Speaker (Planned) |
Matthew Rolchigo |
Abstract Scope |
Microstructures produced via alloy-based Additive processes typically exhibit highly textured columnar grain structures resulting from epitaxial growth of substrate grains. As the first several layers of a microstructure will depend strongly on the substrate and greatly differ from the majority of a build’s microstructure, it is necessary for the calculation of constitutive properties to simulate microstructures representative of the “steady-state” grain structures that make up the majority of real parts. We employ the OpenFOAM computational fluid dynamics software with cellular automata (CA) modeling to better understand this evolution of grain structure with the number of deposited layers. Results will focus on microstructure convergence as functions of substrate (texture and grain size), processing (scan pattern), and material (interfacial response and nucleation). *Work performed under auspices of the U.S. DOE by LLNL under contract DE-AC52-07NA27344 and Oak Ridge National Laboratory under U.S. Government Contract DE-AC05-00OR22725, and supported by ECP (17-SC-20-SC), a collaborative effort of U.S. DOE Office of Science and NNSA. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |