| About this Abstract |
| Meeting |
TMS Specialty Congress 2025
|
| Symposium
|
The 7th International Congress on 3D Materials Science (3DMS 2025)
|
| Presentation Title |
High Speed High-Energy Diffraction Microscopy During Ti64 Dwell Fatigue |
| Author(s) |
Kenneth Peterson, Kelly Nygren, Sven E. Gustafson, Arthur Woll, Paul Shade, Mark Obstalecki, Darren C. Pagan |
| On-Site Speaker (Planned) |
Kenneth Peterson |
| Abstract Scope |
Dwell fatigue failure has been proposed to initiate from stress concentrations resulting from accumulated slip during dwell. However, to date, a challenge to determining precise conditions at failure nucleation stem from the difficulty of resolving the transient interplay of deformation mechanisms at appropriate time scales. Fortunately, the next generation of synchrotron-compatible load frames and wide dynamic-range X-ray area detectors have enabled diffraction data collection in situ with unprecedented speed and fidelity. This new capability allows for investigation into 3D deformation processes that had previously been inaccessible, like the subtle evolution of stress that occurs within individual grains during dwell. Here, we utilize these technological advancements to perform far-field high energy X-ray diffraction microscopy (ff-HEDM) continuously within individual dwell periods during dwell fatigue testing of Ti-6Al-4V at room temperature. FF-HEDM measurement times are reduced from approximately 10 minutes to 10 seconds, enabling unprecedented views of microscale deformation behavior during dwell. |
| Proceedings Inclusion? |
Undecided |