About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
Grain Structure Control Through Modeling of Laser Beam Shaping and Multibeam Solidification |
Author(s) |
Matt Rolchigo, John Coleman, Kellis Kincaid, Benjamin Stump, Gerry Knapp, Alex Plotkowski |
On-Site Speaker (Planned) |
Matt Rolchigo |
Abstract Scope |
Despite wide ranges of laser AM processing conditions and alloys, resulting grain structures tend to have common characteristics such as anisotropy and particular textures. These microstructures are directly related to the melt pool thermal gradients and cooling rates, which tend to support columnar growth and repeatedly favor particular orientations through deposited layers. While additional microstructure control is possible by altering the input energy distribution, this creates the new challenge of expanding the already wide process space. We demonstrate the ability of GPU-capable models to narrow this processing space through efficient and accurate prediction of AM grain structure trends using shaped lasers and multibeam solidification. Relationships between predicted grain size, shape, and texture and melt pool characteristics are discussed as well as implications of the process-microstructure relationships on heat source design for grain structure control. Work performed under the auspices of the U.S. Department of Energy under contract DE-AC05-00OR22725 for ORNL. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Additive Manufacturing, Solidification |