Journal
ACTA MATERIALIA
Volume 61, Issue 14, Pages 5263-5277Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2013.05.018
Keywords
Torsion; Magnesium; Texture; Dynamic recrystallization; Continuous dynamic recovery
Funding
- French State through the program Investment in the future
- National Research Agency [ANR-11-LABX-0008-01]
- DST-FIST program at IISc, Bangalore
- Agence Nationale de la Recherche (ANR) [ANR-11-LABX-0008] Funding Source: Agence Nationale de la Recherche (ANR)
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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.
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