Phase-field Modeling of the Initial Transient in Directional Solidification of Al-4wt%Cu Alloy
文献类型：期刊论文
| 作者 | Y. Chen ; A. A. Bogno ; B. Billia ; X. H. Kang ; H. Nguyen-Thi ; D. Z. Li ; X. H. Luo ; J. M. Debierre |
| 刊名 | Isij International
 |
| 出版日期 | 2010 |
| 卷号 | 50期号:12页码:1895-1900 |
| 关键词 | directional solidification alloys initial transient microstructure transition phase-field modeling Al-Cu alloy synchrotron X ray imaging free dendritic growth finite-element-method binary alloy numerical simulations crystal-growth cu alloy computation prediction stability |
| ISSN号 | 0915-1559 |
| 中文摘要 | The initial transient in directional solidification of Al-4wt%Cu alloy by cooling-down is investigated by numerical simulation using the phase-field model proposed by Karma (Phys Rev Lett 87 (2001) 115701) which includes solute antitrapping in mass conservation relation and is solved by the adaptive finite element method The simulated velocity of the unsteady planar solidification interface and the solute profile in the liquid are always close to the predictions of the Warren Langer analytical model of initial solidification transient (Phys Rev E 47 (1993) 2702) but only in the very beginning of growth in fair quantitative agreement with the experimental data obtained by means of in situ and real time X-ray radiography at the European Synchrotron Radiation Facility (ESRF) Then the influence of gravity-driven fluid flow becomes significant in experiments and increases with time In the phase field simulations once the smooth solidification front has lost morphological stability in the initial solidification transient the evolution of the non-planar solid-liquid interface microstructure varies with the processing control parameters It is found that the solid liquid interface shape changes through transitions from flat to cellular cellular to dendritic cellular or dendritic to seaweed depending on the values of the applied cooling rate and temperature gradient |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31035]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Y. Chen,A. A. Bogno,B. Billia,et al. Phase-field Modeling of the Initial Transient in Directional Solidification of Al-4wt%Cu Alloy[J]. Isij International,2010,50(12):1895-1900. |
| APA | Y. Chen.,A. A. Bogno.,B. Billia.,X. H. Kang.,H. Nguyen-Thi.,...&J. M. Debierre.(2010).Phase-field Modeling of the Initial Transient in Directional Solidification of Al-4wt%Cu Alloy.Isij International,50(12),1895-1900. |
| MLA | Y. Chen,et al."Phase-field Modeling of the Initial Transient in Directional Solidification of Al-4wt%Cu Alloy".Isij International 50.12(2010):1895-1900. |
入库方式： OAI收割
来源：金属研究所
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