| About this Abstract |
| Meeting |
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
| Symposium
|
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
| Presentation Title |
Modeling of Location-specific Grain Shape and Texture Development in the AMB2018-01 Bridge Specimen |
| Author(s) |
Matthew Rolchigo, John S. Coleman, Gerry L. Knapp, Alex J. Plotkowski, James F. Belak |
| On-Site Speaker (Planned) |
Matthew Rolchigo |
| Abstract Scope |
EBSD measurements from various locations within the AMB2018-01 specimen show a complex microstructure, consisting of multiple distributions of grain sizes and textures that further vary with location in the part. We apply AdditiveFOAM and ExaCA to model melt pool development and as-solidified grain structure as a function of build height, starting from the baseplate, in L7, L8, and L9. It is found that melt pool geometry differences as a function of location within the scan pattern, particularly between L8 and L7/L9 and between even and odd deposited layers, are a significant driver of grain size and texture development. Model assumptions and predicted microstructure results are validated against in-situ build observations and characterization results. Calibration of uncertain ExaCA parameters such as nucleation density based on experimental results is also discussed. Work supported by ECP (17-SC-20-SC) and performed under the auspices of Oak Ridge National Laboratory (ORNL) under U.S. Government Contract DE-AC05-00OR22725. |
| Proceedings Inclusion? |
Undecided |