English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/209449
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Anisotropic Plastic Behavior in an Extruded Long-Period Ordered Structure Mg90Y6.5Ni3.5 (at.%) Alloy

AuthorsGarcés, Gerardo; Barea, Rafael; Stark, A.; Schell, N.
KeywordsMagnesium alloys
Long period stacking ordered structures (LPSO)
Synchrotron radiation diffraction
Issue Date7-Apr-2020
PublisherMultidisciplinary Digital Publishing Institute
CitationCrystals 10(4): 279 (2020)
AbstractThe Mg90Y6.5Ni3.5 alloy composed almost completely of the Long-Period-Stacking-Ordered (LPSO) phase has been prepared by casting and extrusion at high temperature. An elongated microstructure is obtained where the LPSO phase with 18R crystal structure is oriented with its basal plane parallel to the extrusion direction. Islands of α-magnesium are located between the LPSO grains. The mechanical properties of the alloy are highly anisotropic and depend on the stress sign as well as the relative orientation between the stress and the extrusion axes. The alloy is stronger when it is compressed along the extrusion direction. Under this configuration, the slip of <a> dislocations in the basal plane is highly limited. However, the activation of kinking induces an increase in the plastic deformation. In the transversal extrusion direction, some grains deform by the activation of basal slip. The difference in the yield stress between the different stress configurations decreases with the increase in the test temperature. The evolution of internal strains obtained during in-situ compressive experiments reveals that tensile twinning is not activated in the LPSO phase.
Description© 2020 by the authors.
Publisher version (URL)https://doi.org/10.3390/cryst10040279
Appears in Collections:(CENIM) Artículos
Files in This Item:
File Description SizeFormat 
Anisotropic_Garces.pdf3,36 MBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.