دورية
The Diffusion and Solid-Liquid Phase Transformation in Directional Solidification of Alloy: A Quantitative Phase Field Characterization and Real-Time Observation
| العنوان: | The Diffusion and Solid-Liquid Phase Transformation in Directional Solidification of Alloy: A Quantitative Phase Field Characterization and Real-Time Observation |
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| المؤلفون: | Chen, Yun, Xiao, Na Min, Li, Dian Zhong, Gong, Tong Zhao, Nguyen-Thi, Henri |
| المصدر: | Diffusion Foundations; February 2018, Vol. 15 Issue: 1 p97-127, 31p |
| مستخلص: | Directional solidification is a paradigm process to gain the desired microstructure via certain applied solidification parameters. A thorough understanding of the diffusion-limited solid-liquid interface morphology evolution from initial transient to steady state is of uppermost importance to optimize the solidification processes. The rapid development of quantitative phase-field model provides a feasible computational tool to explore the underlying physics of the morphological transition at different stages. On basis of the diffusion-limited quantitative phase-field simulations using adaptive finite element method, the directional solidification of Al-4wt.%Cu alloy is characterized and both the solid interface propagation speed and solute profile are analyzed. The simulations are then compared with the in situ and real-time observation by means of synchrotron radiation x-ray radiography image. Good agreements are obtained between simulations and experimental data. Detailed mechanism that controls the morphological instability and transition are then addressed. |
| قاعدة البيانات: | Supplemental Index |
Full Text Finder | تدمد: | 22963650 22963642 |
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| DOI: | 10.4028/www.scientific.net/DF.15.97 |