Predicting the Energetics and Kinetics of Cr Atoms in Fe-Ni-Cr Alloys Via Physics-Based Machine Learning

Author

Yuchu Wang
Bita Ghaffari
Christopher Taylor
Semen Naumovich Lekakh, Missouri University of Science and TechnologyFollow
Mei Li
Yue Fan

Abstract

The energy and activation barrier distributions of Cr atoms in austenitic alloys are investigated over a multiplicity of modeling samples across a wide range of chemical (e.g. solid solutions vs. segregated states) and microstructural (e.g. bulk vs. grain boundaries) environments. Assisted with a physics-based machine learning algorithm, it is found that the thermodynamic and kinetic behaviors of Cr atoms can be reliably predicted according to the local electronegativity (χ) and free volume of local atomic packing (V_v). The corresponding predictive maps in the χ-V_v parameter space are established, which are in line with existing experiments and validated by a parallel modeling with a different interatomic force field. The implications of the present study regarding its potential to guide the design of austenitic alloys with desired properties are also discussed.

Recommended Citation

Y. Wang et al., "Predicting the Energetics and Kinetics of Cr Atoms in Fe-Ni-Cr Alloys Via Physics-Based Machine Learning," Scripta Materialia, vol. 205, article no. 114177, Elsevier, Dec 2021.

The definitive version is available at https://doi.org/10.1016/j.scriptamat.2021.114177

Department(s)

Materials Science and Engineering

International Standard Serial Number (ISSN)

1359-6462

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2021 Acta Materialia Inc., All rights reserved.

Publication Date

01 Dec 2021