| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Characterization of the Impact of Grain-Neighborhoods on Cyclic Twinning in Magnesium Alloys Using High Energy X-Ray Diffraction |
| Author(s) |
Duncan A. Greeley, Mohammadreza Yaghoobi, Katherine Shanks, Darren Pagan, Veera Sundararaghavan, John Allison |
| On-Site Speaker (Planned) |
Duncan A. Greeley |
| Abstract Scope |
Twinning and detwinning are a primary concern for cyclic deformation in magnesium alloys, and accurately modelling grain-scale cyclic mechanical response requires a more detailed understanding of the role of grain neighborhoods on deformation twin activity. In this study, we have developed an automated reconstruction procedure for identifying and tracking 3D grain-resolved twin evolution in magnesium alloys using combined far-field and near-field High Energy X-Ray Diffraction Microscopy (HEDM). Twinning and detwinning were characterized using this reconstruction procedure in pure magnesium, Mg-4wt.%Al, Mg-7.5wt.%Y, and Mg-2.4wt.%Nd during single cycle compression-tension displacements experiments at the Cornell High Energy Synchrotron Source (CHESS). The impact of grain local neighborhood texture and stress states on the evolution of cyclic twinning and detwinning and the role of binary alloying and grain size on twin activity were investigated, and the grain-scale cyclic mechanical response in the reconstructed microstructures were modelled using crystal plasticity finite element methods. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Magnesium |