About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Computational Discovery and Design of Materials
|
Presentation Title |
High-Throughput Artificial Neural Network - Kinetic Monte Carlo (ANN-KMC) Framework for Diffusion Studies in FeNiCrCoCu High-entropy Alloys of Versatile Compositions |
Author(s) |
Wenjiang Huang, Xianming Bai |
On-Site Speaker (Planned) |
Wenjiang Huang |
Abstract Scope |
The existence of sluggish diffusion in high-entropy alloys (HEAs) is a controversial topic and has many ongoing discussions. Currently, only limited compositions (e.g., equiatomic) in HEAs have been studied. To study non-quiatomic compositions, this work presents an innovative artificial neural network (ANN) model that can predict the vacancy migration barriers for arbitrary local atomic environments in a model FeNiCrCoCu HEA system. Remarkably, the model uses the training data only from the equiatomic HEA while it can predict barriers in non-equiatomic HEAs. The ANN model is used as an on-the-fly barrier calculator for kinetic Monte Carlo (KMC) simulations, achieving diffusivities in line with the independent molecular dynamic (MD) simulations but with a much higher efficiency. The ANN-KMC modeling is then used to calculate the diffusivities in about 1500 non-equiatomic HEAs to screen sluggish compositions. The characteristics in these sluggish compositions are analyzed, which could provide useful insights for HEA design. |
Proceedings Inclusion? |
Planned: |
Keywords |
Machine Learning, High-Entropy Alloys, Computational Materials Science & Engineering |