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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Material Behavior Characterization via Multi-Directional Deformation of Sheet Metal
Presentation Title Effects of Y Concentration on Mechanical Response of Mg-Y Alloys
Author(s) Xin Wang, Jiaxiang Wang, Kehang Yu, Timothy J. Rupert, Subhash Mahajan, Enrique J. Lavernia, Irene J. Beyerlein, Julie M. Schoenung
On-Site Speaker (Planned) Xin Wang
Abstract Scope The addition of rare earth elements has led to promising enhancement of the room temperature ductility of Mg. Further improvements in the mechanical properties of Mg alloys, however, will require a fundamental understanding of the effects of alloying elements on deformation mechanisms. The mechanical behavior of four basal-textured Mg-Y sheet alloys, with compositions of Mg-0.2Y, Mg-0.6Y, Mg-1Y and Mg-3Y (wt%), was studied in both tension and compression along the rolling direction, and in compression along the normal direction. The multi-directional deformation stress-strain curves and texture evolution were correctly reproduced by Visco-Plastic Self-Consistent (VPSC) modeling by incorporating twin-affected dislocation trapping rates. The combination of experiments and modeling yields a more comprehensive understanding of the effects of Y concentration on the activities of slip and twinning modes, which were further validated by transmission electron microscopy (TEM).
Proceedings Inclusion? Planned: Supplemental Proceedings volume


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