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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pereda, Jorge
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2021Effect of sub-boundaries on primary spacing dynamics during 3D directional solidification conducted on DECLIC-DSIcitations
- 2020Experimental characterization and theoretical analysis of cell tip oscillations in directional solidificationcitations
- 2018Thermal-field effects on interface dynamics and microstructure selection during alloy directional solidificationcitations
- 2018Formation des microstructures de solidification dans des alliages transparents modèles des alliages métalliques ; Dynamics of solidification microstructure formation of transparent alloys under diffusive transport regime
- 2017Convection Effects During Bulk Transparent Alloy Solidification in DECLIC-DSI and Phase-Field Simulations in Diffusive Conditionscitations
- 2017Evolution of Primary Spacing during Directional Solidification of Transparent Bulk Samples Conducted on DECLIC-DSI
- 2016Dynamics of Microstructure Formation in 3D Directional Solidification of Transparent Model Alloys under Microgravity: Analysis of the Primary Spacing Evolution
- 2016In Situ and Real Time Observation of Microstructure Formation during Directional Solidification of a 3D-alloy: Experiments in the DECLIC-DSIcitations
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article
Effect of sub-boundaries on primary spacing dynamics during 3D directional solidification conducted on DECLIC-DSI
Abstract
To characterize the dynamical formation of three-dimensional (3D) arrays of cells and dendrites under diffusive growth conditions, in situ monitoring of a series of experiments on a transparent succinonitrile-0.24 wt% camphor model alloy was carried out under low gravity in the DECLIC Directional Solidification Insert onboard the International Space Station. The continuous interface observation enables to construct space-time evolution maps of cell location and primary spacing. Both convergent and divergent sub-boundaries are identified and new insights on their effects on the spatiotemporal evolution of the pattern are thus evidenced. 3D phase-field simulations that reproduce the experimental sub-boundary configurations are performed to support the analyses. Even for the low angle sub-boundaries studied, the primary spacing increases or decreases in the vicinity of the boundary respectively for divergent and convergent sub-boundary. This effect may extend on a long distance within the different sub-grains and its magnitude depends on the average primary spacing and its positioning relative to the limits of the stability band. On the sample scale, the primary spacing profile is also influenced by the presence of sources and sinks at the crucible wall due to the pattern drift. Their type and distance from the sub-boundaries give rise to complex spatial distributions of primary spacing over the entire sample.