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Analysis of texture evolution in magnesium during equal channel angular extrusion

Beausir, Benoît and Satyam, Suwas and Tóth, László S and Neale, Kenneth W and Fundenberger, Jean-Jacques (2008) Analysis of texture evolution in magnesium during equal channel angular extrusion. In: Acta Materialia, 56 (2). pp. 200-214.

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Abstract

Texture development in magnesium during equal channel angular extrusion (ECAE) with an angle of 90° between the intersecting channels has been studied. Textures were simulated using polycrystal plasticity models as well as determined experimentally for routes $A, B_c$ and C up to four passes. Based on a previous study on texture evolution during the simple shear of materials with hexagonal crystal structures [Beausir B, Tóth LS, Neale KW. Acta Mater 2007;2695:2705], the ideal orientations for ECAE of hexagonal metals were identified considering the shear to be at the 45° intersection plane of the two channels. Although dynamic recrystallization (DRX) was experimentally observed during the ECAE experiments, the polycrystal modeling using the viscoplastic self-consistent (VPSC) model was able to reproduce the experimental textures successfully. This was attributed to the fact that the textures were c-type fibers with their axis of rotation parallel to the c-axis, whereas the nucleation of grains during DRX takes place in positions simply rotated around the c-axis.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Equal channel angular extrusion; Magnesium; Ideal orientations; Texture; Crystal plasticity.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 08 Mar 2008
Last Modified: 19 Sep 2010 04:43
URI: http://eprints.iisc.ernet.in/id/eprint/13356

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