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Dendritic microstructure formation in a directionally solidified Al-11.6Cu-0.85Mg alloy
X. F. Zhang; J. Z. Zhao
2014
Source PublicationJournal of Crystal Growth
ISSN0022-0248
Volume391Pages:52-58
AbstractDirectional solidifications have been done with Al-11.6Cu-0.85Mg (in weight percent) alloy by using a Bridgman apparatus. The maximum, minimum, and average primary dendrite spacing are measured. The results show that the primary dendrite spacing depends on solidification velocity exponentially. The microstructure evolution in the directionally solidified Al-Cu-Mg alloys is simulated by using threedimensional (3-D) cellular automaton (CA) method. The simulation is carried out by fully coupling the kinetic calculations with the thermodynamic calculations. The numerical results are in favorable agreement with the experimental ones. They demonstrate that the formation and growth of tertiary dendrite is determined by the interdendritic solid/liquid (S/L) interface stability as well as the overlap of the concentration fields of the relevant dendrites. The evolution of the dendritic structure during solidification is analyzed in detail. (C) 2014 Elsevier B.V. All rights reserved.
description.department[zhang, x. f.] shenyang ligong univ, sch mat sci & engn, shenyang 110159, peoples r china. [zhao, j. z.] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; zhao, jz (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china. ; jzzhao@imr.ac.cn
KeywordDendrites Directional Solidification Solid Solutions Computer Simulation Primary Spacing Selection Cellular-automaton Model Tip Radius Unidirectional Solidification Multicomponent Alloys Growth-rate Simulation Aluminum Carbon
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Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72970
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
X. F. Zhang,J. Z. Zhao. Dendritic microstructure formation in a directionally solidified Al-11.6Cu-0.85Mg alloy[J]. Journal of Crystal Growth,2014,391:52-58.
APA X. F. Zhang,&J. Z. Zhao.(2014).Dendritic microstructure formation in a directionally solidified Al-11.6Cu-0.85Mg alloy.Journal of Crystal Growth,391,52-58.
MLA X. F. Zhang,et al."Dendritic microstructure formation in a directionally solidified Al-11.6Cu-0.85Mg alloy".Journal of Crystal Growth 391(2014):52-58.
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