Machine learning assisted design of FeCoNiCrMn high-entropy alloys with ultra-low hydrogen diffusion coefficients

Xiao Ye Zhou, Ji Hua Zhu, Yuan Wu, Xu Sheng Yang, Turab Lookman, Hong Hui Wu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

The broad compositional space of high entropy alloys (HEA) is conducive to the design of HEAs with targeted performance. Herein, a data-driven and machine learning (ML) assisted prediction and optimization strategy is proposed to explore the prototype FeCoNiCrMn HEAs with low hydrogen diffusion coefficients. The model for predicting hydrogen solution energies from local HEA chemical environments was constructed via ML algorithms. Based on the inferred correlation between atomic structures and diffusion coefficients of HEAs built using ML models and kinetic Monte Carlo simulations, we employed the whale optimization algorithm to explore HEA atomic structures with low hydrogen diffusion coefficients. HEAs with low H diffusion coefficients were found to have high Co and Mn content. Finally, a quantitative relationship between the diffusion coefficient and chemical composition is proposed to guide the design of HEAs with low H diffusion coefficients and thus strong resistance to hydrogen embrittlement.

Original languageEnglish
Article number117535
JournalActa Materialia
Volume224
DOIs
Publication statusPublished - 1 Feb 2022

Keywords

  • High entropy alloy
  • Hydrogen embrittlement
  • Machine learning
  • Material design

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Cite this