About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Characterization of the Impact of Neighboring Twin Activity on Grain-Resolved Deformation in a Mg-Al Alloy Using High Energy X-Ray Diffraction Microscopy |
Author(s) |
Duncan A. Greeley, Mohammadreza Yaghoobi, Katherine Shanks, John Allison |
On-Site Speaker (Planned) |
Duncan A. Greeley |
Abstract Scope |
The cyclic deformation of basal textured magnesium alloys is strongly influenced by localized strain accommodation during deformation twinning and detwinning. In particular, variations in grain-scale mechanical response during twin formation and growth are mediated by the interaction of the twin and the local grain neighborhood. In this study, the impact of local neighborhood texture, stress states, and twin activity on grain-scale deformation during compression-tension displacement was investigated in a Mg-Al alloy using High Energy X-Ray Diffraction Microscopy. Grain stress states during twin nucleation and detwinning display high variability and are influenced by the degree of neighborhood twin activity and the geometric alignment of parent and neighboring twins. The impact of neighborhood twin activity and texture on twin-formation-induced back stress in the parent lattice, slip mode hardening during continued displacement, and the evolution of the stress states of the twinned lattices are additionally investigated. |
Proceedings Inclusion? |
Planned: |