Nucleation-dependent early growth of dendritic grains in Al-Cu alloys: The real-time observations and large-scale phase-field simulations
文献类型：期刊论文
| 作者 | Gong, Tongzhao1; Chen, Yun1; Li, Dianzhong1; Hao, Weiye1,2; Fan, Weiqi1,2; Reinhart, Guillaume3; Cao, Yanfei1; Chen, Xing-Qiu1; Nguyen-Thi, Henri3 |
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2024-11-25 |
| 卷号 | 1006页码:12 |
| 关键词 | Solidification Equiaxed dendritic growth Nucleation undercooling In situ and real-time observation Phase-field simulation |
| ISSN号 | 0925-8388 |
| DOI | 10.1016/j.jallcom.2024.176259 |
| 通讯作者 | Chen, Yun(chenyun@imr.ac.cn) ; Li, Dianzhong(dzli@imr.ac.cn) |
| 英文摘要 | Formation of a dendritic grain starts from nucleation and then growth propagation occurs. Through the in situ and real-time solidification experiments of Al-Cu alloys observed by synchrotron X-ray imaging, it is found that the early-stage free growth rate of dendritic grains goes far beyond the concept described by the classical crystal growth theory. The rate gradually drops down even though the liquid is continuously cooled down. Quantitative 3D phase-field simulations demonstrate that this abnormal early-stage growth behavior depends strongly on the nucleation. A critical nucleus can grow rapidly to a peak rate driven by the initial nucleation undercooling, and then its rate gradually drops down to a minimum before it approaches the steady-state free growth regime. This strong dependence of the early-stage growth on the nucleation is then supported by an analytical model, and this correlation enables the accurate identification of the nucleation undercooling for each grain in the experiment and thus allows for a large-scale quantitative simulation of the real-time observed polycrystalline growth. This progress provides a comprehensive understanding on the crystal growth kinetics from a critical nucleus to the growth end, and thus will provide a new theoretical framework to design novel technology to control the solidification microstructures. |
| 资助项目 | National Science and Technology Major Project[J2019-VI-0019-0134] ; National Natural Science Foundation of China[52203301] ; China Post-doctoral Science Foundation[2021TQ0335] ; Youth Talent Program of Shenyang National Laboratory for Materials Science ; French National Space Center (CNES)[174800/00] |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001307824900001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Science and Technology Major Project ; National Natural Science Foundation of China ; China Post-doctoral Science Foundation ; Youth Talent Program of Shenyang National Laboratory for Materials Science ; French National Space Center (CNES) |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Chen, Yun; Li, Dianzhong |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Aix Marseille Univ, Univ Toulon, CNRS, IM2NP, Marseille, France |
| 推荐引用方式 GB/T 7714 | Gong, Tongzhao,Chen, Yun,Li, Dianzhong,et al. Nucleation-dependent early growth of dendritic grains in Al-Cu alloys: The real-time observations and large-scale phase-field simulations[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2024,1006:12. |
| APA | Gong, Tongzhao.,Chen, Yun.,Li, Dianzhong.,Hao, Weiye.,Fan, Weiqi.,...&Nguyen-Thi, Henri.(2024).Nucleation-dependent early growth of dendritic grains in Al-Cu alloys: The real-time observations and large-scale phase-field simulations.JOURNAL OF ALLOYS AND COMPOUNDS,1006,12. |
| MLA | Gong, Tongzhao,et al."Nucleation-dependent early growth of dendritic grains in Al-Cu alloys: The real-time observations and large-scale phase-field simulations".JOURNAL OF ALLOYS AND COMPOUNDS 1006(2024):12. |
入库方式： OAI收割
来源：金属研究所
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