| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Extending High Energy Diffraction Microscopy to Track Localized Deformation with an Intragranular Signature during Cyclic Loading |
| Author(s) |
Dalton Shadle, Kelly Nygren, Matthew Miller |
| On-Site Speaker (Planned) |
Dalton Shadle |
| Abstract Scope |
Localized deformation in a ductile, polycrystalline metal subjected to cyclic loading can be a life-limiting mechanism leading to fatigue crack initiation. Current in-situ characterizations, like in-situ high energy diffraction microscopy (HEDM), observe certain aspects of individual grains as they evolve due to localized deformation, but fall short of characterizing the polycrystal everywhere, all the time, at all resolutions. While in-situ HEDM “peers” within a material throughout evolution of the polycrystal, it fails to directly “see” localized deformation in the form of irreversible, and potentially fatal, localized slip. In this study, near-field and far-field HEDM are coupled with a new data reduction technique to track a signature of localized deformation in an Inconel-718 superalloy subjected to fully reversed cyclic loading. This signature, constructed from intragranular stress and orientation distributions, allows us to indirectly detect the presence of localized slip and focus our study on the most critical grain neighborhoods. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Modeling and Simulation |