Modeling of melting and resolidification of equiaxed microstructures in a temperature gradient
| Autor: | Hui Fang, Mingfang Zhu, Qianyu Tang, Qingyu Zhang, Markus Rettenmayr, Hua Xue, Shiyan Pan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Equiaxed crystals Coalescence (physics) Zone melting Liquid fraction Materials science Mechanical Engineering Alloy Metals and Alloys Thermodynamics 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Temperature gradient Mechanics of Materials 0103 physical sciences engineering General Materials Science Grain boundary 0210 nano-technology |
| Zdroj: | Scripta Materialia. 151:28-32 |
| ISSN: | 1359-6462 |
| Popis: | Melting and resolidification in a temperature gradient are simulated using a cellular automaton (CA) model for an Al–Cu alloy with initially equiaxed microstructures. The simulations exhibit liquid pockets appearing at grain boundaries and in the grain interior, as well as their coalescence and migration towards the high temperature direction due to temperature gradient zone melting. The simulated microstructures agree well with experimental micrographs. The liquid fraction and solute concentration distributions throughout the mushy zone are quantified; they compare reasonably well with analytical predictions. The simulations provide insight into the complex interactions among temperature gradient and solute (re)distribution during melting/resolidification. |
| Databáze: | OpenAIRE |
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