Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The effect of microstructure length scale on dry sliding wear behaviour of monotectic Al-Bi-Sn alloys

Full text
Author(s):
Costa, Thiago A. ; Dias, Marcelino ; Freitas, Emmanuelle S. ; Casteletti, Luiz C. ; Garcia, Amauri
Total Authors: 5
Document type: Journal article
Source: Journal of Alloys and Compounds; v. 689, p. 767-776, DEC 25 2016.
Web of Science Citations: 11
Abstract

The addition of third elements to Al-based monotectic alloys can increase the alloy load capacity, and depending on the nature of the third element can also improve the tribological characteristics. In the present investigation 1.0 wt.% Sn is added to Al-Bi alloys of hypomonotectic, monotectic and hypermonotectic compositions, giving rise to microstructures typified by droplets of a self-lubricating mixture of Bi and Sn embedded in the Al-matrix. These alloys were directionally solidified with a view to permitting microstructures with a wide range of interphase spacings to be obtained. Micro-adhesive wear tests were carried out and experimental equations relating the wear volume, V, to the interphase spacing are proposed. A more homogeneous distribution of Bi/Sn droplets in the microstructure is shown to be conducive to lower V. The lowest wear rates and wear volumes are shown to be related to the monotectic composition (Al-3.2 wt.% Bi-1wt.% Sn alloy). The presence of higher fraction of Fe-oxide areas interrupting the Bi/Sn lubricant layer, is shown to induce inferior wear resistance for the hypermonotectic alloy (Al-7.0 wt.% Bi-1wt.% Sn) when compared with that of the monotectic alloy. (C) 2016 Elsevier B. V. All rights reserved. (AU)

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
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: 13/15478-3 - Interrelation of Solidification Thermal and Microstructural Parameters and Tribocorrosive Behavior of Al-Zn(Mg) e Zn-Mg Alloys
Grantee:Emmanuelle Sá Freitas Feitosa
Support Opportunities: Scholarships in Brazil - Post-Doctoral