| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Hume-Rothery Symposium on Alloy Microstructure Science and Engineering
|
| Presentation Title |
Explore the Shear Component in Precipitate Plate Formation in Light Alloys |
| Author(s) |
Jian-Feng Nie |
| On-Site Speaker (Planned) |
Jian-Feng Nie |
| Abstract Scope |
Plate-shaped precipitates are commonly observed in age-hardenable aluminium alloys and magnesium alloys, with their habit planes lying parallel to close-packed planes of the matrix phase. In this presentation, we will provide a review of our experimental observations made on these precipitates using atomic-resolution scanning transmission electron microscopy. Our findings demonstrate that these precipitates, traditionally categorized as diffusional and non-displacive, actually possess a significant shear component. These findings provide an insight into the transformation mechanisms, as well as the nucleation and growth behaviours, of these plate-like precipitates. It is proposed that minimizing this shear strain, either through self-accommodation or the presence of external lattice defects like dislocations and solute clusters, plays a crucial role in determining the formation of such precipitates. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Characterization, Aluminum |