Research Article of International Research Journal of Materials Sciences and Applications
Simulation of the Dendritic Growth Velocity for Binary Alloy Al-Cu in the Undercooled System
A. F. Ferreiraa,*, M. A. Oliveira a, D.M. Silva a, M.M.V. Valentea, J.J. Passos and A.R.B. Costa a
a Graduate Program on Metallurgical Engineering, Universidade Federal Fluminense, 27255-125, Volta Redonda, Brazil.
The phase-field model was applied to simulate the solidification kinetics to undercooled Al-Cu alloy. The relationships between material properties and model parameters are presented. The diffusivity of solute in the solid region and liquid and liquidus temperature are calculated during the simulation of solidification process. As an example, the two-dimensional computations for the dendritic growth in Al–Cu binary alloy have been performed. The dendritic morphology calculated by phase-field model showed features that are commonly found in experiments on the solidification. The concentration profiles of solute calculated in the solid region and liquid are not completely horizontal, showing evidence of microsegregation. The velocity of the dendrite tip and solute concentration at the interface front are calculated. It is found that the tip velocity is greatly concentration dependent around interface. In order to validate the growth kinetics predicted by this model tests have been performed for comparison with Stefanescu’s model. The present work based results show good agreement with those obtained by Stefanescu. The dependence of growth velocity on the initial concentration and super-cooling are also demonstrated.
Keywords: Solidification; Undercooling; Kinetics; Phase-field model; Al-Cu
How to cite this article:
Ferreira et al., Simulation of the Dendritic Growth Velocity for Binary Alloy Al-Cu in the Undercooled System. International Research Journal of Materials Sciences and Applications, 2017; 1:4. DOI:10.28933/ijmsa-2017-07-0801
1. A.G. Khachaturyan, Theory of Structural Transformations in Solids, 1nd ed. John Wiley & Sons, New York 1983.
2. A.F. Ferreira, J.A. Castro, I.L. Ferreira, AMM. 2015, 17-21, 704. http:dx. doi:10.4028/www.scientific.net/AMM.704.17
3. M. Ode, T. Suzuki, ISIJ Int. 2002, 42, 368.
4. I.M. Salvino, L.O. Ferreira, A.F. Ferreira, Steel Res. Int. 2012, 83, 723.
5. T. Owadano, Mater. Trans. 2010, 51(5), 976.
6. A.F. Ferreira, L.O. Ferreira, A.C. Assis, J. Braz. Soc. Mech. Sci. Eng. 2011, 33(2), 125.
7. D.M. Stefanescu, Science and engineering of casting solidification. 2nd ed. Springer, Ohio 2009.
8. Y.B. Altundas, G. Caginalp, J. Stat. Phys. 2003, 110, 1055.
9. B. Chalmers, Principles of Solidification, 1nd ed. Wiley, New York 1964.
10. A.F. Ferreira, A.J. Silva, J.A. Castro, Mater. Res. 2006, 9(4), 349.
This work and its PDF file(s) are licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.