| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Tracking Crystal-scale Cyclic Plasticity in Inconel 718 Using High Energy X-rays |
| Author(s) |
Dalton Shadle, Kelly Nygren, Matthew P. Miller |
| On-Site Speaker (Planned) |
Dalton Shadle |
| Abstract Scope |
Fatigue crack initiation in ductile polycrystals during low cycle fatigue conditions depends strongly on the plastic strain history experienced by each crystal. In this work, a High Energy X-ray Diffraction Microscopy (HEDM) experiment conducted at the FAST beamline at the Cornell High Energy Synchrotron Source (CHESS) was used to quantify the evolving 3D stress state and intragrain lattice orientation of each crystal within a deforming Inconel 718 sample subjected to fully reversed cyclic loading. Correlation of the orientation distributions to the aspects of the evolving stress states - such as stress triaxiality – is used to understand the potential for crack initiation. Connections to crystal plasticity simulations are discussed. |
| Proceedings Inclusion? |
Planned: |