Abstract Scope |
Grain boundary properties, such as energy and mobility, are always significant in materials science. Grain boundary properties are not only related to crystallography (macroscopic structure), but also related to atomic positions (microscopic structure). However, since the five-dimensional space of grain boundaries is complex, prediction of grain boundary properties requires a large amount of data or computation time. Data science and machine learning offer an alternative methodology for predicting boundary properties. In this project, we develop crystallographic descriptors and use machine learning to train a model to predict the grain boundary energy from macroscopic structure, and we compare the results to models trained to predict energy from microscopic structure information. Even though there are some limitations, the results are reasonable and accurate compared to the results predicted from atomic structure. This method may provide a computationally efficient approach for calculating grain boundary energy for mesoscale simulations. |