About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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| Presentation Title |
Intragranular Evolution of Slip System Strength and Activity in Titanium Using Point-Focused High-Energy Diffraction Microscopy |
| Author(s) |
Wenxi Li, Hemant Sharma, Peter Kenesei, Jun-Sang Park, Sidharth Ravi, Orcun Koray Celebi, Daegun You, Tolga Berkay Celebi, Huseyin Sehitoglu , Ashley Bucsek |
| On-Site Speaker (Planned) |
Wenxi Li |
| Abstract Scope |
Point-focused high-energy diffraction microscopy (pf-HEDM) is used to non-destructively capture intragranular orientation and full elastic strain tensors in a polycrystalline commercially pure titanium sample under in-situ tensile loading. Intragranular critical resolved shear stresses (CRSS) for prismatic and basal slip systems are derived using a rate-dependent crystal plasticity model and show close agreement with in-situ TEM and ab initio predictions. Additionally, cross-slip activation stress and intragranular hardening coefficients are extracted from experimental data. The results reveal significant spatial heterogeneity in local stress distributions, with elevated stresses near grain boundaries and triple junctions. Schmid factors computed from local stress differ substantially from those based on grain-averaged or macroscopic stress, highlighting the risk of misidentifying active slip systems when intragranular stress is not considered. Through statistical analysis and quantitative investigation, this study underscores the importance of spatially resolved stress measurements for accurately capturing local slip activity and improving the fidelity of micromechanical models. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Titanium |