Machine learning prediction of magnetic properties of Fe-based metallic glasses considering glass forming ability

Fe-based metallic glasses (MGs) have shown great commercial values due to their excellent soft magnetic properties. Magnetism prediction with consideration of glass forming ability (GFA) is of great significance for developing novel functional Fe-based MGs. However, theories or models established based on condensed matter physics exhibit limited accuracy and some exceptions. In this work, based on 618 Fe-based MGs samples collected from published works, machine learning (ML) models were well trained to predict saturated magnetization (B-s) of Fe-based MGs. GFA was treated as a feature using the experimental data of the supercooled liquid region (Delta T-x). Three ML algorithms, namely eXtreme gradient boosting (XGBoost), artificial neural networks (ANN) and random forest (RF), were studied. Through feature selection and hyperparameter tuning, XGBoost showed the best predictive performance on the randomly split test dataset with determination coefficient (R-2) of 0.942, mean absolute percent error (MAPE) of 5.563%, and root mean squared error (RMSE) of 0.078 T. A variety of feature importance rankings derived by XGBoost models showed that Delta T-x played an important role in the predictive performance of the models. This work showed the proposed ML method can simultaneously aggregate GFA and other features in thermodynamics, kinetics and structures to predict the magnetic properties of Fe-based MGs with excellent accuracy. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

Automated summary

Machine learning models were trained to predict the saturated magnetization of Fe-based metallic glasses, considering their glass forming ability. Extreme gradient boosting model showed the best predictive performance on the test dataset, with high accuracy in predicting the magnetization.