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Thermal and microstructural parameters in the transient solidification of Al-Mg and Al-Mg-Si alloys and correlation with mechanical and corrosion resistances

Grant number: 14/25809-0
Support Opportunities:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): April 01, 2015
Effective date (End): June 30, 2015
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Transformation Metallurgy
Principal Investigator:Amauri Garcia
Grantee:Crystopher Cardoso de Brito
Supervisor: Nathalie Mangelinck-Noel
Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Research place: Institut Matériaux Microélectronique Nanosciences de Provence (Im2np), France  
Associated to the scholarship:12/08494-0 - Thermal and Microstructural Parameters in the Transient Solidification of Al-Mg and Al-Mg-Si Alloys and Correlation with Mechanical and Corrosion Resistances, BP.DR


The mechanical characteristics (strength under static and dynamic loading; wear resistance) and chemical characteristics (corrosion resistance) of as solidified metallic components depend on the microstructural arrangement, i.e. grain size and cellular and dendritic spacings; non-homogeneity of chemical composition; size, morphology and distribution of inclusions; porosity, etc. Additionally to the barriers to slip formed by the grain boundaries there are also obstacles between the cellular and dendritic arms. The development of correlations between the as-solidified microstructure and the corresponding properties can be a complex task, which depends on a careful experimental development with a view to determining accurate solidification thermal parameters. The present study aims to develop of a theoretical/ experimental analysis dealing with the effect of transient thermal parameters in the solidification of Al-Mg and Al-Mg-Si alloys on the microstructure development and on macrosegregation profiles, correlations between microstructural parameters and mechanical and corrosion resistances will be established with a view to permitting solidification operational conditions to be pre-programmed in order to allow the casting to attain a determined level of final properties. The experimental sequence will be developed as follows: vertical upward and downward transient directional solidification of Al-Mg and Al-Mg-Si alloys; determination of solidification thermal parameters; development of experimental dendritic growth laws; determination of macrosegregation profiles along the castings length; assessment of mechanical and corrosion properties as a function of the dendritic arm spacing and/or other quantitative aspect of phases forming the as-solidified microstructure. (AU)

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Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
BRITO, C.; BERTELLI, F.; CASTANHO, M. A. P.; GOULART, P. R.; CHEUNG, N.; SPINELLI, J. E.; GARCIA, A.. Upward and downward unsteady-state directional solidification of a hypoeutectic Al-3wt.% Mg alloy. CIENCIA & TECNOLOGIA DOS MATERIAIS, v. 29, n. 1, p. E65-E70, . (13/23396-7, 14/25809-0, 12/08494-0, 14/50502-5, 12/16328-2)
BRITO, CRYSTOPHER; REINHART, GUILLAUME; NGUYEN-THI, HENRI; MANGELINCK-NOEL, NATHALIE; CHEUNG, NOE; SPINELLI, JOSE E.; GARCIA, AMAURI. High cooling rate cells, dendrites, microstructural spacings and microhardness in a directionally solidified Al-Mg-Si alloy. Journal of Alloys and Compounds, v. 636, p. 145-149, . (12/08494-0, 14/25809-0, 13/23396-7)
DA SILVA, CASSIO; SOARES, THIAGO; CHEUNG, NOE; GARCIA, AMAURI; REIS, DANIELI A. P.; BRITO, CRYSTOPHER. Dendritic Spacing and Macrosegregation Affecting Microhardness of an Al-Si-Mg Alloy Solidified Under Unsteady State Conditions. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, v. 22, n. 6, 1, . (12/08494-0, 14/25809-0, 13/23396-7)
BRITO, CRYSTOPHER; VIDA, TALITA; FREITAS, EMMANUELLE; CHEUNG, NOE; SPINELLI, JOSE EDUARDO; GARCIA, AMAURI. Cellular/dendritic arrays and intermetallic phases affecting corrosion and mechanical resistances of an Al-Mg-Si alloy. Journal of Alloys and Compounds, v. 673, p. 220-230, . (13/23396-7, 14/25809-0, 12/08494-0, 14/50502-5, 13/15478-3)

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