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Comparison of the microstructure and thermal stability of an AZ31 alloy processed by ECAP and large strain hot rolling

AuthorsEddahbi, M.; Valle, Jorge del; Pérez Prado, María Teresa; Ruano, Oscar Antonio
Severe plastic deformation
Equal channel angular extrusion
Large strain rol
Issue Date2005
CitationMaterials Science and Engineering - A 410-411 : 308-311 (2005)
AbstractThe aim of this work is to compare the microstructure, the texture, as well as the thermal stability of an AZ31 Mg alloy processed via two different severe plastic deformation processing techniques, namely large strain hot rolling (LSHR) and equal channel angular pressing (ECAP). The microstructure was characterized by optical microscopy and the texture was measured both by X-ray diffraction and electron backscatter diffraction (EBSD). The microstructure obtained via LSHR has average grain sizes around 3 μm, but it is quite heterogeneous. Additionally, a well-defined basal texture develops. ECAP gives rise to a more homogeneous and slightly coarser microstructure, with an average grain size of 7 μm and a shear type texture. The higher resistance of the extruded sample to secondary recrystallization after severe post-deformation annealing is attributed to a texture effect.
Publisher version (URL)http://dx.doi.org/10.1016/j.msea.2005.08.081
Appears in Collections:(CENIM) Artículos
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