Evolution of texture and microstructure during hot torsion of a magnesium alloy

Biswas, Somjeet and Beausir, Benoit and Toth, Laszlo S and Suwas, Satyam (2013) Evolution of texture and microstructure during hot torsion of a magnesium alloy. In: ACTA MATERIALIA, 61 (14). pp. 5263-5277.

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Abstract

A systematic study of the evolution of the microstructure and crystallographic texture during free end torsion of a single phase magnesium alloy Mg-3Al-0.3Mn (AM30) was carried out. The torsion tests were done at a temperature of 250 degrees C to different strain levels in order to examine the progressive evolution of the microstructure and texture. A detailed microstructural analysis was performed using the electron back-scattered diffraction technique. The observed microstructural features indicated the occurrence of continuous dynamic recovery and recrystallization, starting with the formation of subgrains and ending with recrystallized grains with high angle boundaries. Texture and microstructure evolution were analysed by decoupling the effects of imposed shear and of dynamic recrystallization. Microstructure was partitioned to separate the deformed grains from the recovered/recrystallized grains. The texture of the deformed part could be reproduced by viscoplastic self-consistent polycrystal simulations. Recovered/recrystallized grains were formed as a result of rotation of these grains so as to reach a low plastic energy state. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	ACTA MATERIALIA
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copyright of this article is belongs PERGAMON-ELSEVIER SCIENCE LTD
Keywords:	Torsion; Magnesium; Texture; Dynamic recrystallization; Continuous dynamic recovery
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	23 Sep 2013 12:12
Last Modified:	23 Sep 2013 12:12
URI:	http://eprints.iisc.ac.in/id/eprint/47288

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