Numerical analysis of the influence of scale effects and microstructure on hydrogen diffusion in polycrystalline aggregates

E. Legrand, J. Bouhattate, X. Feaugas, S. Touzain, H. Garmestani, M. Khaleel, D. S. Li

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Predicting resistance to environmental degradation, especially hydrogen embrittlement (HE) has become a major concern for life assessment and risk analysis of structural materials. The microstructure of the materials plays a significant role in HE. Despite the large documentation about the subject, the contribution of hydrogen diffusion on this process stays unclear. In this work, we analyze the effects of the microstructure on hydrogen diffusion, especially the influence of grain boundaries considered as high diffusivity paths and possible sites of damage occurrence. Electrochemical permeation was simulated using finite elements method (FEM). Scale effects between the RVE (Representative Volume Element) and the size of the membrane are discussed. Domains of applicability for standard homogenization methods, especially Hashin-Shtrikman model are studied using results from microstructural based FEM. Domains of invariance of diffusion behavior and concentration profiles for grain shapes and the size of the membrane are also analyzed. Thus, the difficulty to extract diffusion properties by permeation test for heterogeneous microstructures is highlighted and discussed.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalComputational Materials Science
Volume71
DOIs
Publication statusPublished - 18 Feb 2013
Externally publishedYes

Fingerprint

scale effect
Scale Effect
Hydrogen
numerical analysis
Numerical analysis
Numerical Analysis
Microstructure
hydrogen embrittlement
microstructure
hydrogen
Hydrogen embrittlement
finite element method
Membrane
Permeation
Finite Element Method
membranes
Homogenization Method
documentation
Risk Analysis
Grain Boundary

Keywords

  • Diffusion
  • Grain boundaries
  • Hydrogen
  • Microstructure
  • Permeation
  • Scale effects

ASJC Scopus subject areas

  • Materials Science(all)
  • Chemistry(all)
  • Computer Science(all)
  • Physics and Astronomy(all)
  • Computational Mathematics
  • Mechanics of Materials

Cite this

Numerical analysis of the influence of scale effects and microstructure on hydrogen diffusion in polycrystalline aggregates. / Legrand, E.; Bouhattate, J.; Feaugas, X.; Touzain, S.; Garmestani, H.; Khaleel, M.; Li, D. S.

In: Computational Materials Science, Vol. 71, 18.02.2013, p. 1-9.

Research output: Contribution to journalArticle

Legrand, E. ; Bouhattate, J. ; Feaugas, X. ; Touzain, S. ; Garmestani, H. ; Khaleel, M. ; Li, D. S. / Numerical analysis of the influence of scale effects and microstructure on hydrogen diffusion in polycrystalline aggregates. In: Computational Materials Science. 2013 ; Vol. 71. pp. 1-9.
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