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Título

The role of extrusion texture on strength and its anisotropy in a Mg-base alloy composed of the Long-Period-Structural-Order phase

Autor Garcés, Gerardo; Muñoz-Morris, Mª Antonia; Morris, David G.; Jiménez, José Antonio; Pérez Zubiaur, Pablo; Adeva, Paloma
Palabras clave Texture
Microstructure
Mechanical properties
Anisotropy
Intermetallics
Fecha de publicación 2014
EditorElsevier
Citación Intermetallics 55: 167-176 (2014)
Resumen© 2014 Elsevier Ltd. All rights reserved. A Mg-Y-Zn alloy composed almost completely of the Long-Period-Stacking-Ordered (LPSO) phase has been prepared by casting and extrusion to flat bar. An elongated microstructure is obtained with different grain orientations along the extrusion, transverse and normal directions, leading to a strong orientation dependence of strength. Differences of tensile and compressive stress are also noted. The importance of basal slip and other dislocation-dependent deformation mechanisms is discussed. The large tension-compression strength differences are considered to imply that twinning plays an important role in determining strength. The analysis of deformation mechanisms and strengthening is supported by metallographic studies of surface slip bands and dislocation distributions.
URI http://hdl.handle.net/10261/113501
DOI10.1016/j.intermet.2014.07.015
Identificadoresdoi: 10.1016/j.intermet.2014.07.015
issn: 0966-9795
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