About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
Characterization of 3-D Slip Fields in Deforming Polycrystals |
Author(s) |
Darren C. Pagan, Kelly E. Nygren, Matthew P Miller |
On-Site Speaker (Planned) |
Darren C. Pagan |
Abstract Scope |
The interactions of slip systems at grain boundaries have been posited to be a critical factor in the nucleation of damage, especially during the dwell fatigue process in titanium alloys. To test these hypotheses, methods are needed to characterize slip activity in-situ in the bulk of deforming polycrystals. Here we present a new methodology that combines measurements of grain average stresses and lattice orientation fields made using high-energy X-ray diffraction microscopy with crystal plasticity kinematics to reconstruct full 3-dimensional slip activity fields with micron-scale resolution. The utility of the method will be demonstrated through analysis of slip activity in Ti-7Al deformed in uniaxial tension with a focus on analyzing slip mismatch at grain boundaries. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |