About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Three-Dimensional Interface Random Walk Method and Intrinsic Grain Boundary Shear Coupling Tensor |
Author(s) |
Xinyuan Song, Chuang Deng |
On-Site Speaker (Planned) |
Xinyuan Song |
Abstract Scope |
Grain boundaries (GBs) in materials can move three-dimensionally due to the shear coupling effect. The concept of the GB mobility tensor has been recently proposed to characterize the three-dimensional kinetic properties of GBs. In this work, we have extended the conventional interface random walk method to three dimensions to extract the GB mobility tensor under pure thermal noise, closely approximating experimental conditions. This method unifies all elements of the GB mobility tensor into a single expression and confirms the symmetry of the GB mobility tensor. From this method, we can further derive the shear coupling tensor, an intrinsic property of GBs. The intrinsic shear coupling tensor can overcome the limitations of the widely used shear coupling factor, β, and accurately predict the variation of the apparent shear coupling factor in response to external driving forces. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Other, |