About this Abstract |
Meeting |
5th International Congress on 3D Materials Science (3DMS 2021)
|
Symposium
|
5th International Congress on 3D Materials Science (3DMS 2021)
|
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 stress localization and subsequent nucleation of damage, especially during the dwell fatigue process in titanium alloys. To test these hypotheses, quantitative 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 (HEDM) 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? |
Definite: Other |