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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.)

Monotectic Al-Bi-Sn alloys directionally solidified: Effects of Bi content, growth rate and cooling rate on the microstructural evolution and hardness

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Author(s):
Costa, Thiago A. [1] ; Freitas, Emmanuelle S. [1] ; Dias, Marcelino [1] ; Brito, Crystopher [1] ; Cheung, Noe [1] ; Garcia, Amauri [1]
Total Authors: 6
Affiliation:
[1] Univ Estadual Campinas, UNICAMP, Dept Mat & Mfg Engn, BR-13083860 Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of Alloys and Compounds; v. 653, p. 243-254, DEC 25 2015.
Web of Science Citations: 14
Abstract

Al-based monotectic alloys can have interesting tribological characteristics with the solute acting as a solid lubricant, while the matrix provides required structural integrity. The addition of third elements can increase the alloy load capacity. The microstructural features of these alloys, such as morphology, distribution and length scale of the phases depend strongly on the parameters of their manufacture route. In the present study monotectic Al-Bi-Sn alloys were directionally solidified (DS) under a large range of experimental cooling rates, permitting a wide spectrum of microstructural scales to be examined. Experimental correlations between the microstructure interphase spacing and solidification cooling rate and growth rate are proposed. Despite a slight increase in hardness with smaller interphase spacings for regions closer to the cooled surface of the DS alloys castings having 2 and 3.2wt.%Bi, it is shown that the Bi content of the alloy has not a significant effect on hardness. It is also shown that the experimental correlations established between the cooling rate and both the interphase spacing and area fractions of droplets of the eutectic mixture can be used in the tailoring of the microstructure of Al-Bi-Sn alloys with a view to applications in the manufacture of wear resistant components. (C) 2015 Elsevier B.V. All rights reserved. (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 Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 13/09267-0 - Microstructural evolution in the transient solidification of monophasic and peritectic Sn-Sb solder alloys (and Sn-Sb-X) and in solder/substrate interfacial layers
Grantee:José Marcelino da Silva Dias Filho
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 14/50502-5 - Interrelation of thermal and microstructural solidification parameters and corrosion/tribocorrosion behavior of alloys for tribological, biomedical and solder applications
Grantee:Amauri Garcia
Support Opportunities: Regular Research Grants
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 Opportunities: Regular Research Grants