About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
Presentation Title |
Characterization of Fatigue Short Crack Growth in Rare-earth Magnesium Alloy WE43 using High Energy X-ray Diffraction Microscopy |
Author(s) |
Duncan A. Greeley, Jacob Adams, Peter Kenesei, Ashley Spear, John Allison |
On-Site Speaker (Planned) |
Duncan A. Greeley |
Abstract Scope |
Rare-earth magnesium alloys show promise for a variety of transportation structural applications due to their high specific strength and low density. To accelerate development of new magnesium alloys and processes, the Predictive Integrated Structural Materials Science (PRISMS) Center is developing simulation tools for predicting fatigue deformation behavior. To accurately model fatigue it is necessary to develop a greater understanding of the mechanistic phenomena involved in short crack growth. To this end, the three-dimensional crystallographic crack path during high-cycle fatigue of magnesium alloy WE43 was investigated using High Energy X-Ray Diffraction Microscopy (HEDM) at The Advanced Photon Source. Coupled far-field diffraction, near-field diffraction, and X-ray computed tomography provide detailed insights into the effect of grain boundaries and local crystallographic orientation on short crack growth and crack path tortuosity. Grain boundary misorientation and grain orientation characteristics are found to correlate to crystallographic and geometric short crack path selection. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |