About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Computational Thermodynamics and Kinetics
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Presentation Title |
O-9: Formation of Grain Boundaries during Polycrystalline Solidification of hcp Alloys |
Author(s) |
Ahmed Kaci Boukellal, Maral Sarebanzadeh, Alberto Orozco-Caballero, Federico Sket, Javier Llorca, Damien Tourret |
On-Site Speaker (Planned) |
Damien Tourret |
Abstract Scope |
Novel lightweight alloys with good mechanical properties, like Magnesium (Mg) based alloys, reduce considerably the energy consumption in transport applications. Most Mg alloys are produced through solidification processes. Grains structures that emerge during this stage affect the mechanical properties and lifetime of the cast component. Therefore, understanding the grains formation during polycrystalline solidification of hcp materials (e.g. Mg) is key to develop novel alloys and to optimize these processes.
We explore the effect on microstructure selection of the: (1) choice of anisotropy function for solid-liquid interface properties, (2) crystalline orientation of competing grains, (3) processing conditions. We focus on the competitive grain growth dynamics, and the selection of dendritic patterns and grain boundaries. We compare our computational results to experimental observations performed on directionally solidified thin samples of Mg alloys.
This study brings a deeper insight into the mechanism of selection during polycrystalline columnar solidification in hcp systems. |
Proceedings Inclusion? |
Planned: |
Keywords |
Solidification, Modeling and Simulation, Magnesium |