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Effects of lateral constraints on the morphology evolution and solute diffusion during solidification in a binary alloy

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Abstract

Effects of lateral constraints on the microstructure evolution during solidification of binary Ni–Cu alloys were studied by implementing a modified phase-field model. Microstructure formations from original free growing dendrite encountering with lateral constraints with different locations were simulated and analyzed. Results indicate that lateral constraints have a significant effect on the microstructure evolution by re-development of a dendrite–columnar structure. The solute partition at solid–liquid interfaces was detected and the effect of relative distance between the original free growing dendrite and constraints was investigated and discussed. Especially, effects of lateral constraints on growth of dendrite arrays with different original spacing were investigated, and a regulating effect of the constraints on the microstructure formations was detected and discussed. In general, the relative distance between growing dendrites and lateral constraints is the determinant of the solidifying microstructure by affection the solute and temperature distribution, and thus, lateral constraints can be implemented as an effective way to regulate the microstructure formations.

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Acknowledgements

This work was supported by the Natural Science Foundation of China (51501146, 21503165), the PhD research startup foundation of Xi’an University of Science and Technology (2015QDJ017), the Key Innovation Team of Shaanxi Province (2014KCT-04), and the Major International Joint Research Program of Shaanxi Province (2012KW-10).

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  1. College of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an, 710054, People’s Republic of China

    Lifei Du, Peng Zhang, Jie Chen & Huiling Du

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  1. Lifei Du
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  2. Peng Zhang
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Correspondence to Lifei Du.

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Du, L., Zhang, P., Chen, J. et al. Effects of lateral constraints on the morphology evolution and solute diffusion during solidification in a binary alloy. Appl. Phys. A 123, 311 (2017). https://doi.org/10.1007/s00339-017-0943-0

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