论文信息 - Equal channel angular extrusion in a commercial Al–Mn alloy

Equal channel angular extrusion in a commercial Al–Mn alloy

Abstract The study of superplastic forming in aluminium alloys has involved many efforts for its cost and engineering advantages. Mechanistically, the ability of a crystalline material to undergo superplastic behaviour is usually linked to a submicrometer grain size. Equal channel angular extrusion (ECAE) is an innovative technique for developing an ultrafine-grained (UFG) microstructure by introducing severe plastic deformation in a bulk material with no changes in their cross-section. This work presents a study using finite element modelling (FEM) of the ECAE process with two usual angles of 90° and 120°, considering different friction conditions. Deformation imparted through the ECAE process, is studied by modifying the processing conditions and determining the effect of friction between the dies and the billet. Moreover, experimental ECAE processes has been carried out with the 3103 Al–Mn alloy and the 5083 Al–Mg alloy, through Route A. The channel angle was 120° for the former and 90° for the latter, and the process was conducted at room temperature and 200 °C, respectively.

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