Twinning and grain subdivision during dynamic deformation of a Mg AZ31 sheet alloy at room temperature

Dudamell, N.V. and Ulacia, I. and Gálvez Díaz-Rubio, Francisco and Yi, S. and Bohlen, J. and Letzig, D. and Hurtado, I. and Pérez Prado, María Teresa (2011). Twinning and grain subdivision during dynamic deformation of a Mg AZ31 sheet alloy at room temperature. "Acta Materialia", v. 59 (n. 18); pp. 6949-6962. ISSN 1359-6454. https://doi.org/10.1016/j.actamat.2011.07.047.

Description

Title: Twinning and grain subdivision during dynamic deformation of a Mg AZ31 sheet alloy at room temperature
Author/s:
  • Dudamell, N.V.
  • Ulacia, I.
  • Gálvez Díaz-Rubio, Francisco
  • Yi, S.
  • Bohlen, J.
  • Letzig, D.
  • Hurtado, I.
  • Pérez Prado, María Teresa
Item Type: Article
Título de Revista/Publicación: Acta Materialia
Date: October 2011
ISSN: 1359-6454
Volume: 59
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The microstructural evolution of an AZ31 rolled sheet during dynamic deformation at strain rates of ∼103 s−1 has been investigated by electron backscatter diffraction, X-ray and neutron diffraction. The influence of orientation on the predominant deformation mechanisms and on the recovery processes taking place during deformation has been systematically examined. The results have been compared with those corresponding to the same alloy tested quasi-statically under equivalent conditions. It has been found that strain rate enhances the activation of extension twinning dramatically, while contraction and secondary twinning are not significantly influenced. The polarity of extension twinning is even reversed in some grains under selected testing conditions. Significant grain subdivision by the formation of geometrically necessary boundaries (GNBs) takes place during both quasi-static and dynamic deformation of this AZ31 alloy. It is remarkable that GNBs of high misorientations form even at the highest strain rates. The phenomenon of recovery has been found to be orientation dependent

More information

Item ID: 12387
DC Identifier: http://oa.upm.es/12387/
OAI Identifier: oai:oa.upm.es:12387
DOI: 10.1016/j.actamat.2011.07.047
Deposited by: Memoria Investigacion
Deposited on: 10 Aug 2012 10:22
Last Modified: 24 Sep 2018 11:11
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