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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Dendritic Spacing and Macrosegregation Affecting Microhardness of an Al-Si-Mg Alloy Solidified Under Unsteady State Conditions

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Author(s):
da Silva, Cassio [1] ; Soares, Thiago [2] ; Cheung, Noe [2] ; Garcia, Amauri [2] ; Reis, Danieli A. P. [1] ; Brito, Crystopher [3]
Total Authors: 6
Affiliation:
[1] Univ Fed Sao Paulo UNIFESP, Dept Ciencia & Tecnol, BR-12231280 Sao Jose Dos Campos, SP - Brazil
[2] Univ Estadual Campinas, UNICAMP, Dept Engn Manufatura & Mat, BR-13083860 Campinas, SP - Brazil
[3] Univ Estado Sao Paulo UNESP, BR-13876750 Sao Joao Da Boa Vista, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 22, n. 6, 1 2019.
Web of Science Citations: 0
Abstract

The prediction of microstructure morphology is fundamental for the manufacture of metallic components, since the expected levels of mechanical properties will be associated with the final aspects of the microstructure. In this work, an Al-7wt.%Si-3wt.%Mg alloy was directionally solidified in unsteady state conditions in order to investigate the influence of the addition of 3wt.%Mg to an Al-7wt.%Si alloy on the solidification evolution. The microstructure of the examined alloy is shown to be characterized by a more complex arrangement of phases, as compared to that of the Al-7wt.%Si alloy, which includes the binary (alpha-Al+Mg2Si) and refined ternary (alpha-Al+Si+Mg2Si+Fe-rich IMC) eutectic mixtures. A higher Vickers hardness profile is shown to be associated with a more refined microstructural arrangement. However, for cooling rates lower than 2K/s the microhardness is shown to increase with the increase in the microstructural spacing, which is shown to occur caused by Si macrosegregation and higher content of free Mg. (AU)

FAPESP's process: 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
Grantee:Crystopher Cardoso de Brito
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 14/25809-0 - Thermal and microstructural parameters in the transient solidification of Al-Mg and Al-Mg-Si alloys and correlation with mechanical and corrosion resistances
Grantee:Crystopher Cardoso de Brito
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 13/23396-7 - Effects of solidification MicrostructureParameters of Aluminum-based multicomponent alloys (Al-Mg-Si; Al-Sn-Cu; Al-Zn-Mg) on the resistances to Corrosionand tribocorrosion degradation
Grantee:Amauri Garcia
Support type: Regular Research Grants