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Microstructure and Texture of Al2SixSn (x = 0, 4, 8 mass%) Alloys Processed by Equal Channel Angular Pressing

Article dans une revue avec comité de lecture
Author
GONZALEZ, Gonzalo
250023 Universidad Nacional Autónoma de México = National Autonomous University of Mexico [UNAM]
ccBRAHAM, Chedly
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
LEBRUN, Jean-Lou
211916 Laboratoire Angevin de Mécanique, Procédés et InnovAtion [LAMPA]
CHASTEL, Yvan
1158 Centre de Mise en Forme des Matériaux [CEMEF]
SEILER, Wilfrid
FIGUEROA, Ignacio A.
196410 Instituto de Investigaciones en Materiales (Mexico, Mexico)

URI
http://hdl.handle.net/10985/10185
DOI
10.2320/matertrans.M2012011
Date
2012
Journal
Materials Transactions

Abstract

The influence of Sn on the microstructure, microstrain and grain morphology in Al–2Si–xSn samples processed by ECAP is reported and discussed. The pseudo-binary Al–xSn alloys (where x = 0, 4, 8 mass%) were produced by conventional ingot casting. Samples were characterised by X-ray diffractometry (XRD), transmission electron microscopy (TEM), dynamical mechanical analysis (DMA) and microhardness. Results showed that the initial texture was modified after several ECAP passes and the formation of subgrains were observed. The presence of Sn enhanced the tribological properties of the alloy but, the ECAP capacity for grain refining was reduced. Besides, it was also confirmed that the damping capacity and microhardness behaviour were dependent of the Sn contents.

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