About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
3D Insitu Characterization of Twinning Inside Individual Mg4Al Grains Using Darkfield X-ray Microscopy |
Author(s) |
Sangwon Lee, Can Yildirim, Carsten Detlefs, John Allison, Ashley Bucsek |
On-Site Speaker (Planned) |
Sangwon Lee |
Abstract Scope |
Understanding of deformation twinning mechanisms in magnesium (Mg) alloys is critical for enhancing their mechanical properties. However, the deformation and fracture behavior in Mg alloys are significantly influenced by the local stress fields associated with twinning, and accurately characterizing local stresses before, during, and after twinning remains still a challenge. Here, we present a 3D in-situ characterization of the emergence and evolution of tensile twins inside individual Mg-4wt.%Al grains during mechanical loading using dark field X-ray microscopy (DFXM). This characterization includes 3D spatially-resolved maps of orientation, elastic strain, and twin morphology in the parent grain with 100 nm spatial resolution, including the local stress fields near twin and grain interfaces. The results are used to provide insights into the underlying micro-mechanisms governing the plastic deformation of magnesium alloys, including the interaction between neighboring grains and twin evolution in the parent grain during mechanical loading. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Magnesium, Other |