Lei de Crescimento em Função da Posição para Ligas do Sistema Monotético

José F A Braga; Cássio A P Silva; José E Spinelli; Amauri Garcia; Adrina P Silva

doi:10.5433/1679-0375.2016v37n1p35

Growth Law of Microstructural Parameter for Monotectic Aluminum-based Alloys

Authors

José F A Braga Programa de Pós-Graduação em Engenharia Industrial da Universidade Federal do Pará - UFPA
Cássio A P Silva Faculdade de Engenharia Mecânica - Universidade Federal do Pará - UFPA
José E Spinelli Departamento de Materiais - Universidade Federal de São Carlos - UFSCar
Amauri Garcia Faculdade de Engenharia Mecânica - Universidade Estadual de Campinas - Unicamp
Adrina P Silva Programa de Pós-Graduação em Engenharia Industrial da Universidade Federal do Pará - UFPA

DOI:

https://doi.org/10.5433/1679-0375.2016v37n1p35

Keywords:

Unsteady-state directional solidification, Monotectic systems, Growth laws, Position

Abstract

Monotectic alloys show promising applications in wear-resistant automotive components. Much research has been devoted in order to better comprehend monotectic reactions. Some researches assume that the interphase spacing evolution in monotectic alloys follows the classical relationship used for eutectics or the dendritic growth relationship. However, some studies reported that the aforementioned growth laws seem not to be valid for some cases. In the present study, the results of directional unsteady-state solidification experiments with hypomonotectic Al-0.9wt%Pb and Al-5.5wt%In, monotectic Al-1.2wt%Pb and hypermonotectic Al-5.0wt%Bi, Al-7.0wt%Bi and Al- 2.1wt%Pb alloys, under different heat extracting configurations ( upward and downward) were taken into account to propose a new and exclusive growth law for monotectic systems. It was possible to establish a single monotectic growth law as a function of position from the metal/mold interface.

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Published

2016-03-16

How to Cite

Braga, J. F. A., Silva, C. A. P., Spinelli, J. E., Garcia, A., & Silva, A. P. (2016). Growth Law of Microstructural Parameter for Monotectic Aluminum-based Alloys. Semina: Ciências Exatas E Tecnológicas, 37(1), 35–44. https://doi.org/10.5433/1679-0375.2016v37n1p35

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Issue

Vol. 37 No. 1 (2016)

Section

Original Article

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