| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermodynamics and Kinetics of Alloys II
|
| Presentation Title |
Dynamics of Strain-energy-driven Grain Growth |
| Author(s) |
Marcel Chlupsa, Zachary Croft, Guanglong Huang, Eli Rotman, Katsuyo Thornton, Ashwin Shahani |
| On-Site Speaker (Planned) |
Marcel Chlupsa |
| Abstract Scope |
An understanding of microstructural dynamics under non-isothermal conditions is crucial to materials design. Here, we explore the effects of stored strain energy on grain growth in a CuAlMn alloy, taken as a model system exhibiting semi-coherent phase interfaces. We employ synchrotron high-energy x-ray diffraction microscopy (HEDM) to map grains and precipitates in 3D and time and probe the strain within them. We quench the sample at three points in the annealing schedule for data acquisition. Correspondingly, we use phase field simulations to bridge the spatiotemporal gaps in the HEDM study and propose a mechanism of strain-energy-driven growth. Our joint experiments and simulations reveal a significant variance in grain shapes, sizes, and dislocation densities that are generated over the course of non-isothermal grain growth. Broadly, our efforts highlight the complexity of microstructural dynamics brought about by stored strain energy, not predicted by conventional theories nor metallographic analyses. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, Other |