About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Correlative 4DSTEM Study of Deformation Near Serrated Grain Boundaries |
| Author(s) |
Xinren Chen, Yazhuo Liu, Yi Hu, Shaolou Wei, Wolfgang Ludwig , Edgar Rauch, Baptiste Gault, Ting Zhu, Xuyang Zhou, Dierk Raabe |
| On-Site Speaker (Planned) |
Xinren Chen |
| Abstract Scope |
Grain boundaries with serrated morphology are often observed in engineered microstructures designed for enhanced mechanical performance, yet the underlying deformation behavior near such boundaries remains insufficiently understood. In this work, we employ four-dimensional scanning transmission electron microscopy (4DSTEM) to map local strain and deformation fields around a serrated grain boundary in Fe-B specimen subjected to in-situ tensile loading. The high spatial resolution of 4DSTEM enables direct visualization of strain localization, dislocation activity, and lattice rotations across the boundary during progressive deformation. Our analysis reveals that the serrated interface changes slip path and lattice orientation during loading, which results in a winding crack path and consumes more energy when fracture, contributing to enhanced damage tolerance. These insights advance our understanding of grain boundary engineering and offer new perspectives for tailoring microstructures to improve mechanical properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Characterization, Computational Materials Science & Engineering |