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

Dudamell, N.V.; Ulacia, I.; Galvez Diaz-Rubio, Francisco; Yi, S.; Bohlen, J.; Letzig, D.; Hurtado, I. y 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.

Descripción

Título: Twinning and grain subdivision during dynamic deformation of a Mg AZ31 sheet alloy at room temperature
Autor/es:
  • Dudamell, N.V.
  • Ulacia, I.
  • Galvez Diaz-Rubio, Francisco
  • Yi, S.
  • Bohlen, J.
  • Letzig, D.
  • Hurtado, I.
  • Pérez Prado, María Teresa
Tipo de Documento: Artículo
Título de Revista/Publicación: Acta Materialia
Fecha: Octubre 2011
Volumen: 59
Materias:
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Ciencia de los Materiales
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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

Más información

ID de Registro: 12387
Identificador DC: http://oa.upm.es/12387/
Identificador OAI: oai:oa.upm.es:12387
Identificador DOI: 10.1016/j.actamat.2011.07.047
Depositado por: Memoria Investigacion
Depositado el: 10 Ago 2012 10:22
Ultima Modificación: 21 Abr 2016 11:38
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