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Application of computational thermodynamics to the determination of thermophysical properties as a function of temperature for multicomponent Al-based alloys

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Autor(es):
Nascimento, Fabiana C. [1] ; Paresque, Mara C. C. [2] ; de Castro, Jose A. [1] ; Jacome, Paulo A. D. [2] ; Garcia, Amauri [3] ; Ferreira, Ivaldo L. [2]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Fed Fluminense, Grad Program Met Engn, BR-27255125 Volta Redonda, RJ - Brazil
[2] Univ Fed Fluminense, Grad Program Mech Engn, BR-27255125 Volta Redonda, RJ - Brazil
[3] Univ Campinas UNICAMP, Dept Mfg & Mat Engn, BR-13083860 Campinas, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Thermochimica Acta; v. 619, p. 1-7, NOV 10 2015.
Citações Web of Science: 4
Resumo

Despite the technological importance of Al-Si-Cu alloys in manufacturing processes involving heat transfer, such as welding, casting and heat treatment, thermophysical properties of this system of alloys are very scarce in the literature. In this paper, a model connected to a computational thermodynamics software is proposed permitting density and specific heats as a function of temperature and enthalpy of transformations to be numerically determined. The model is pre-validated against experimental density as a function of temperature for liquid and solid phases of A319 and 7075 alloys found in the literature and validated against experimental density values for the solid phase of an Al-6 wt%Cu-1 wt%Si alloy determined in the present study. In both cases the numerical predictions are in good agreement with the experimental results. Specific heat and temperatures and heats of transformation are also numerically determined for this ternary Al-based alloy. (C) 2015 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 13/23396-7 - Efeitos de parâmetros da microestrutura de solidificação de ligas multicomponentes à base de alumínio (Al-Mg-Si; Al-Sn-Cu; Al-Zn-Mg) nas resistências à degradação por corrosão e tribocorrosão
Beneficiário:Amauri Garcia
Linha de fomento: Auxílio à Pesquisa - Regular