About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
Characterization and Modeling of Deformation Twinning in Mg during Compression and Tension |
Author(s) |
Zhe Chen, Mohammadreza Yaghoobi, Veera Sundararaghavan, John Allison, Samantha Daly |
On-Site Speaker (Planned) |
Zhe Chen |
Abstract Scope |
The twinning and detwinning behavior in magnesium alloys was characterized during in-situ compression followed by tension. Full-field deformation was measured by combined use of scanning electron microscopy and digital image correlation (SEM-DIC). Twinning was identified by clustering and computer vision applied to the deformation data. Statistical analysis was performed to investigate the effect of microstructure on twinning nucleation and growth. The nominal Schmid factor exhibited the most significant effect on twinning, while the effects of other metrics including the m’ factor, the residual burgers vector, and neighbor strain accommodation was insignificant. A new rate-independent crystal plasticity finite element (CPFE) model using the open-source, high performance PRISMS-Plasticity CPFE framework was used to simulate these experiments. The contributions of the stresses inside both parent grain and twinned children were considered to simulate the effects of microstructure on twinning. The strain and twin maps of SEM-DIC were well-simulated by the PRISMS-Plasticity CPFE model. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnesium, Characterization, Modeling and Simulation |