About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Developments in Advanced Nuclear Structural Materials
|
| Presentation Title |
From Nanoscale Differentiation to Mesoscale Organization: Creation and Evolution of Self- Assembled Dislocation Structures |
| Author(s) |
Yao Li, Ziang Yu, Yajie Zhao, Kaijun Yin, Austin Houston, Yan-ru Lin, Ling Wang, Haixuan Xu, Jianmin Zuo, Gerd Duscher, Steven Zinkle |
| On-Site Speaker (Planned) |
Yao Li |
| Abstract Scope |
Efficient self-organization or self-assembly processes are ubiquitous in nature. However, the development of functionally useful self-organized structures remains relatively underdeveloped in alloys, primarily due to incomplete mechanistic understanding. This presentation reports on two long-observed yet inadequately explained self-organized dislocation (SOD) configurations: petal-shaped dislocation loops and loop walls. This work posits that SOD complexity originates from atomistic interactions driving hierarchical organization. Through atomic-scale simulations and high-resolution transmission electron microscopy, we demonstrate that minor habit plane offsets initiate loop self-organization, stabilized by intrinsic structural features and restricted mobility. These configurations generate anisotropic strain fields that induce dual effects: anisotropic growth facilitated by external strain gradients, and progressive structural decomposition driven by internal strains. This study elucidates how complex hierarchical architectures in metallic crystals emerge from the synergistic interplay of fundamental physical principles. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Nanotechnology, Iron and Steel |