About this Abstract |
Meeting |
6th World Congress on Integrated Computational Materials Engineering (ICME 2022)
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Symposium
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6th World Congress on Integrated Computational Materials Engineering (ICME 2022)
|
Presentation Title |
Modeling of Grain Structure Development as a Function of Melt Pool Shape and Grid Resolution During Alloy AM |
Author(s) |
Matthew Rolchigo, John Coleman, Gerry Knapp, Sam Reeve, Robert Carson, Jim Belak |
On-Site Speaker (Planned) |
Matthew Rolchigo |
Abstract Scope |
Grain structure development during AM processing is strongly dependent on material and scan pattern, as different melt pool conditions yield variation in epitaxial growth of substrate grains and nucleation of new grains. When modeling grain structure development from a substrate as a function of layer and passing the modeled grain structures to property calculations, it is important that the microstructure is representative of the majority of the build and as independent of the estimated initial condition as possible. This study uses the cellular automata (CA)-based ExaCA model to examine effects of substrate (an initial condition), nucleation density (a material input), and scan pattern (a process input) on “quasi steady-state” (i.e., not changing significantly as a function of layer) grain structure development. Grain sizes and textures will be quantified and compared, and associated variation in constitutive properties calculated using ExaConstit will also be discussed. |
Proceedings Inclusion? |
Definite: Other |