Numerical simulations of solidification microstructure evolution process for commercial-purity aluminum alloys inoculated by Al-Ti-B refiner

doi:10.7498/aps.70.20201431

CORC > 金属研究所 > 中国科学院金属研究所

	Numerical simulations of solidification microstructure evolution process for commercial-purity aluminum alloys inoculated by Al-Ti-B refiner
	Song Yan 1,2; Jiang Hong-Xiang 1,2; Zhao Jiu-Zhou 1,2; He Jie 1,2; Zhang Li-Li 1; Li Shi-Xin 1,2
刊名	ACTA PHYSICA SINICA
	2021-04-20
卷号	70 期号:8 页码:9
关键词	aluminum alloys nucleation grains growth modeling
ISSN号	1000-3290
DOI	10.7498/aps.70.20201431
通讯作者	Jiang Hong-Xiang(hxjiang@imr.ac.cn) ; Zhao Jiu-Zhou(jzzhao@imr.ac.cn)
英文摘要	Solidification microstructure of aluminum alloy has a great influence on the properties of the casting. An aluminum alloy with the structure of fine equiaxed grains has low casting defects and presents excellent mechanical properties. Recently, chemical inoculation by adding grain refiner is the technique most extensively used to achieve a fine, equiaxed grain structure of Al alloy in the industrial production. In order to investigate the detailed solidification microstructure evolution of the alloy, many numerical models have been proposed. Cellular automaton method is one of the powerful tools for simulating the morphology evolution of detailed grains in the solidification process of alloy. However, the present cellular automata model has a shortcoming, that is, its calculation of the nucleation rate is based on the experimental number density of grains. In this work, a population dynamics-cellular automaton model is developed for describing the solidification microstructure evolution of the inoculated aluminum alloy. The model takes account of the heterogeneous nucleation of alpha-Al nucleus, the initial spherical growth of a-Al grains and the dendritic growth process. The model is used for simulating the solidification microstructure evolution of the commercial-purity aluminum (CP-Al) inoculated by Al-5Ti-1B master alloy. The results indicate that the heterogeneous nucleation process of alpha-Al can be divided into the two stages. In the early stage of nucleation, there are enough effective particles in the melt. The nucleation rate of alpha-Al increases with the increase of the undercooling of the melt. After a short time, the nucleation of alpha-Al is dominated by the number density of the effective particles in the melt. Nucleation process stops when the recalescence takes place. The effects of the additive amount of Al-5Ti-1B master alloy and the cooling rate of the melt on the solidification microstructure of the CP-Al are investigated by using the established model. The final solidification structures of CP-Al are predicted. And a comparison between the predicted results and the experimental ones shows that they are in good agreement with each other.
资助项目	Chinese Academy of Sciences Strategic Priority Program on Space Science, China[XDA15013800] ; Natural Science Foundation of Liaoning Province, China[2020-MS-005] ; National Natural Science Foundation of China[51771210] ; National Natural Science Foundation of China[51501207] ; National Natural Science Foundation of China[51971227]
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000643680000029
资助机构	Chinese Academy of Sciences Strategic Priority Program on Space Science, China ; Natural Science Foundation of Liaoning Province, China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/161660]
专题	金属研究所_中国科学院金属研究所
通讯作者	Jiang Hong-Xiang; Zhao Jiu-Zhou
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Song Yan,Jiang Hong-Xiang,Zhao Jiu-Zhou,et al. Numerical simulations of solidification microstructure evolution process for commercial-purity aluminum alloys inoculated by Al-Ti-B refiner[J]. ACTA PHYSICA SINICA,2021,70(8):9.
APA	Song Yan,Jiang Hong-Xiang,Zhao Jiu-Zhou,He Jie,Zhang Li-Li,&Li Shi-Xin.(2021).Numerical simulations of solidification microstructure evolution process for commercial-purity aluminum alloys inoculated by Al-Ti-B refiner.ACTA PHYSICA SINICA,70(8),9.
MLA	Song Yan,et al."Numerical simulations of solidification microstructure evolution process for commercial-purity aluminum alloys inoculated by Al-Ti-B refiner".ACTA PHYSICA SINICA 70.8(2021):9.