Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/819
Title: Numerical simulation of solute trapping phenomena using phase-field solidification model for dilute binary alloys.
Authors: Furtado, Henrique Silva
Bernardes, Américo Tristão
Machado, Romuel Figueiredo
Silva, Carlos Antônio da
Keywords: Phase-field
Solute trapping
Dilute alloys
Solidification
Issue Date: 2009
Citation: FURTADO, H. S. et al. Numerical simulation of solute trapping phenomena using phase-field solidification model for dilute binary alloys. Materials Research, v. 12, n.3, p.345-351, 2009. Disponível em: <http://www.scielo.br/pdf/mr/v12n3/v12n3a16.pdf>. Acesso em: 05 jun. 2012.
Abstract: Numerical simulation of solute trapping phenomena using phase-field solidification model for dilute binary alloys Numerical simulation of solute trapping during solidification, using two phase-field model for dilute binary alloys developed by Kim et al. [Phys. Rev. E, 60, 7186 (1999)] and Ramirez et al. [Phys. Rev. E, 69, 05167 (2004)] is presented here. The simulations on dilute Cu-Ni alloy are in good agreement with one dimensional analytic solution of sharp interface model. Simulation conducted under small solidification velocity using solid liquid interface thickness (2λ) of 8 nanometers reproduced the solute (Cu) equilibrium partition coefficient. The spurious numerical solute trapping in solid phase, due to the interface thickness was negligible. A parameter used in analytical solute trapping model was determined by isothermal phase-field simulation of Ni-Cu alloy. Its application to Si-As and Si-Bi alloys reproduced results that agree reasonably well with experimental data. A comparison between the three models of solute trapping (Aziz, Sobolev and Galenko [Phys. Rev. E, 76, 031606 (2007)]) was performed. It resulted in large differences in predicting the solidification velocity for partition-less solidification, indicating the necessity for new and more acute experimental data.
URI: http://www.repositorio.ufop.br/handle/123456789/819
ISSN: 15161439
metadata.dc.rights.license: Autorização concedida ao Repositório Institucional da UFOP pelo Periódico Materials Research em 25/10/2013 para depositar uma cópia eletrônica dos artigos publicados por esse periódico em que ao menos um dos autores é aluno ou professor da UFOP.
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