Microstructure and Texture Evolution of the Al-20Sn Alloy Processed by Equal-Channel Angular Pressing Using Route C

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  • Hernández C.
    Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México
  • Figueroa I. A.
    Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México
  • Alfonso I.
    Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México
  • Braham C.
    Laboratoire Procédés et Ingénierie en Mécanique et Matériaux
  • Castillo P.
    Laboratorio de Microscopía Electrónica, Universidad Autónoma Metropolitana
  • Gonzalez G.
    Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México Laboratoire Procédés et Ingénierie en Mécanique et Matériaux

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In this work, the microstructure and texture evolution of an Al-20Sn (mass%) alloy processed by Equal Channel Angular Pressing is presented. The evolution of dislocation cells into subgrains and the mechanical response of the deformed alloy have been emphasized. Samples were characterized by transmission electron microscopy, X-ray diffraction (for microstrain and texture measurements) and Vickers microhardness. It was found, that Al grains, suffered the highest degree of deformation during the ECAP process, however, the evidence showed that the deformation was largely heterogeneous, in terms of crystalline domain and feasibly in misorientation angles. The initial copper texture changes throughout the ECAP process forming an incipient shear texture component (111)[11-2]. The heterogeneity of the results obtained from the Vickers microhardness mapping could be associated to the microstructure resulted after the ECAP process.

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