Evaluation of thermophysical properties of Al-Sn-Si alloys based on computational thermodynamics and validation by numerical and experimental simulation of solidification

Autor(es)

Bertelli, Felipe ^{[1, 2]} ; Cheung, Noe ^[3] ; Ferreira, Ivaldo L. ^[4] ; Garcia, Amauri ^[3]

Afiliação do(s) autor(es)

^[1] Santa Cecilia Univ UNISANTA, Dept Mech Engn, BR-11045907 Santos - Brazil

^[2] Santa Cecilia Univ UNISANTA, Postgrad Program Mech Engn, BR-11045907 Santos - Brazil

^[3] Univ Campinas UNICAMP, Dept Mfg & Mat Engn, BR-13083860 Campinas, SP - Brazil

^[4] Fed Univ Para UFPA, Inst Technol, Augusto Correa Ave 1, BR-66075110 Belem, PA - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF CHEMICAL THERMODYNAMICS; v. 98, p. 9-20, JUL 2016.
• Citações Web of Science: 4

Resumo

Modelling of manufacturing processes of multicomponent Al-based alloys products, such as casting, requires thermophysical properties that are rarely found in the literature. It is extremely important to use reliable values of such properties, as they can influence critically on simulated output results. In the present study, a numerical routine is developed and connected in real runtime execution to a computational thermodynamic software with a view to permitting thermophysical properties such as: latent heats; specific heats; temperatures and heats of transformation; phase fractions and composition and density of Al-Sn-Si alloys as a function of temperature, to be determined. A numerical solidification model is used to run solidification simulations of ternary Al-based alloys using the appropriate calculated thermophysical properties. Directional solidification experiments are carried out with two Al-Sn-Si alloys compositions to provide experimental cooling rates profiles along the length of the castings, which are compared with numerical simulations in order to validate the calculated thermophysical data. For both cases a good agreement can be observed, indicating the relevance of applicability of the proposed approach. (C) 2016 Elsevier Ltd. 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
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/21893-6 - Correlação entre microestruturas de solidificação e propriedades mecânicas e tribológicas de ligas Al-Sn-Cu e Al-Sn-Si
• Beneficiário: Felipe Bertelli
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 12/16328-2 - Correlação entre Microestruturas de Solidificação e Propriedades Mecânicas e Tribológicas de Ligas Al-Sn-Cu e Al-Sn-Si
• Beneficiário: Felipe Bertelli
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado