| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior Related to Interface Physics IV
|
| Presentation Title |
Asymmetrical Tilt Grain Boundaries Shear Coupling Prediction via Disconnection-Based Model |
| Author(s) |
Ruoqi Dang, Yong-Wei Zhang, Huajian Gao |
| On-Site Speaker (Planned) |
Ruoqi Dang |
| Abstract Scope |
Grain boundaries (GBs) play a critical role in determining the mechanical properties of polycrystalline materials. However, due to the structural complexity, characterizing the loading response of GB is challenging. Disconnection framework has been widely used to study the shear coupled GB migration and has been extensively verified in experiments. While successful for symmetrical tilt grain boundaries (STGBs), this method faces difficulties in accurately modeling asymmetrical tilt grain boundaries (ATGBs), which are more common in real materials. Here, we combine molecular dynamics (MD) simulations with the disconnection framework to develop a new method for describing the disconnection modes in ATGBs. The predicted shear coupling factors from our model show perfect agreement with MD simulations for pure disconnection-mediated migration, which enhances our understanding of GB behavior and provide guidance for GB engineering. |
| Proceedings Inclusion? |
Planned: |