About this Abstract |
Meeting |
6th International Congress on 3D Materials Science (3DMS 2022)
|
Symposium
|
6th International Congress on 3D Materials Science (3DMS 2022)
|
Presentation Title |
3D Characterization of Grain-scale Cyclic Twinning and Detwinning in Magnesium Alloys using High Energy X-ray Diffraction |
Author(s) |
Duncan A. Greeley, Mohammadreza Yaghoobi, Katherine Shanks, Darren C. Pagan, Veera Sundararaghavan, John E. Allison |
On-Site Speaker (Planned) |
Duncan A. Greeley |
Abstract Scope |
Magnesium is a promising material for lightweight structural parts in the transportation industries due to its low density and high specific strength. Cyclic deformation is a primary concern for structural components, and accurately modelling cyclic mechanical response in magnesium alloys requires a more detailed understanding of the impact of twinning on grain-scale deformation. In this study, we have developed an automated reconstruction procedure for identifying and tracking 3D grain-scale 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 twinning and detwinning on the evolution of grain-resolved deformation and the role of binary alloying on twin activity were investigated, and grain-scale mechanical response was modelled using crystal plasticity finite element methods. |
Proceedings Inclusion? |
Definite: Other |