Effect of Solute Diffusion on Dendrite Growth in the Molten Pool of Al-Cu Alloy
| Autor: | Cheng Gu, Xiaohong Zhan, Yanhong Wei, Yun Liu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Chemistry Alloy Metals and Alloys Thermodynamics 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Dendrite (crystal) Mechanics of Materials 0103 physical sciences Metallic materials Materials Chemistry engineering Solute diffusion Tip growth 0210 nano-technology Molten pool |
| Zdroj: | Metallurgical and Materials Transactions B. 48:2685-2694 |
| ISSN: | 1543-1916 1073-5615 |
| Popis: | A cellular automaton (CA)–finite difference model is developed to simulate dendrite growth and solute diffusion during solidification process in the molten pool of Al-Cu alloy. In order to explain the interaction between the dendritic growth and solute distribution, a series of CA simulations with different solute diffusion velocity coefficients are carried out. It is concluded that the solute concentration increases with dendrite growing and solute accumulation in the dendrite tip. Converged value of the dendrite tip growth velocity is about 480 μm/s if the mesh size is refined to 2 μm or less. Growth of the primary dendrite and the secondary dendrite is mainly influenced by solute diffusion at the dendrite tips. And growth of secondary and tertiary dendrites is mainly influenced by solute diffusion at interdendrite. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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