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Analysis of microstructure and texture evolution in pure magnesium during symmetric and asymmetric rolling

Beausir, Benoit and Biswas, Somjeet and Kim, Dong Ik and Toth, Laszlo S and Suwas, Satyam (2009) Analysis of microstructure and texture evolution in pure magnesium during symmetric and asymmetric rolling. In: Acta Materialia, 57 (17). pp. 5061-5077.

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Abstract

Asymmetric rolling of commercially pure magnesium was carried out at three different temperatures: room temperature, 200 degrees C and 350 degrees C. Systematic analysis of microstructures, grain size distributions, texture and misorientation distributions were performed using electron backscattered diffraction in a field emission gun scanning electron microscope. The results were compared with conventional (symmetric) rolling carried out under the same conditions of temperature and strain rate. Simulations of deformation texture evolution were performed using the viscoplastic self-consistent polycrystal plasticity model. The main trends of texture evolution are faithfully reproduced by the simulations for the tests at room temperature. The deviations that appear for the textures obtained at high temperature can be explained by the occurrence of dynamic recrystallization. Finally, the mechanisms of texture evolution in magnesium during asymmetric and symmetric rolling are explained with the help of ideal orientations, grain velocity fields and divergence maps displayed in orientation space.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Asymmetric rolling;Symmetric rolling;HCP;Textures;Magnesium.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 29 Oct 2009 06:04
Last Modified: 19 Sep 2010 05:52
URI: http://eprints.iisc.ernet.in/id/eprint/24842

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