Yield symmetry and reduced strength differential in Mg-2.5Y alloy. (November 2016)

• Record Type: Journal Article
• Authors: Zhang, Dalong; Wen, Haiming; Kumar, M. Arul; Chen, Fei; Zhang, Lianmeng; Beyerlein, Irene J.; Schoenung, Julie M.; Mahajan, S.; Lavernia, Enrique J.
• Is Part Of: Acta materialia. Volume 120(2016)
• Page Start: 75
• Page End: 85
• Publication Date: 2016-11
• Subjects: Magnesium alloy -- Texture -- Dislocation imaging -- Tension/compression asymmetry -- Crystal plasticity; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2016.08.037
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: In this study we report novel results obtained with an extruded fine-grained Mg-2.5 at.% Y alloy (FG Mg-2.5Y) exhibiting tension/compression yield symmetry and reduced strength differential, in addition to well-balanced strength and ductility. On the basis of detailed post-mortem transmission electron microscopy studies, atom probe tomography, and electron back-scattered diffraction (EBSD) characterization, we propose that the presence of a supersaturated solid solution strengthening for basal slip, and the enhanced activity of prismatic slip are the major causes for the unusual mechanical behavior. Graphical abstract: