Abstract
By linking to the thermodynamic and atomic mobility databases in Al alloys well established in our research group, the microstructure evolution in industrial A2214 alloy (Al-4.5Cu-0.5Mg-1.0Si, in wt pct) during solidification process was studied by means of two-dimensional phase-field simulation via MICRostructure Evolution Simulation Software in the framework of the multi-phase-field formalism. The thermophysical parameters including interfacial energies and interfacial mobilities were carefully chosen for reproducing the experimental features. The solidification sequence due to the present phase-field simulation conforms to both equilibrium calculation and Scheil simulation. The predicted microstructure reproduces the experimental data very well. These facts indicate that a quantitative phase-field simulation was achieved in the present work. Moreover, the mechanisms of characteristic patterns and microstructure formation were revealed with the aid of the phase-field simulation. In addition, the effect of cooling rate on the secondary dendrite arm spacing and microsegregation was also investigated through comprehensive comparison with the experimental data.
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Acknowledgments
The financial supports from the National Natural Science Foundation of China (Grant No. 51474239), National Natural Science Foundation for Youth of China (Grant No. 51301208), National Basic Research Program of China (Grant Nos. 2011CB610401, 2014CB644002), and Sino-German Center for Promotion of Science (Grant No. GZ755) are acknowledged. Ying Tang acknowledges support from Hunan Provincial Innovation Foundation for Postgraduate. Lijun Zhang acknowledges support from Shenghua Scholar Program of Central South University, Changsha, P.R. China.
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Manuscript submitted January 20, 2015.
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Wei, M., Tang, Y., Zhang, L. et al. Phase-Field Simulation of Microstructure Evolution in Industrial A2214 Alloy During Solidification. Metall Mater Trans A 46, 3182–3191 (2015). https://doi.org/10.1007/s11661-015-2911-7
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DOI: https://doi.org/10.1007/s11661-015-2911-7