Mesoscale Model for Predicting Hydrogen Damage in Face Centred Cubic Crystals

E. Ogosi, A. Siddiq* (Corresponding Author), P. Christie, U. B. Asim, M. E. Kartal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A study has been performed using a crystal plasticity based finite element method to understand the effect of various stress states and crystal orientations with respect to loading direction for FCC single crystals in both hydrogenated and nonhydrogenated environment. Simulations have been performed for a variety of stress triaxilaities, Lode parameters, crystal orientations and hydrogen concentrations. It has been observed that crystal orientation has a varied effect on the influence of hydrogen on plastic deformation and void growth. Hydrogen in trap distribution at various stages of the deformation process was also found to be influenced by crystal orientation. From analyses performed, an analytical relationship between normalised void fraction and equivalent strain has been derived.

Original languageEnglish
Pages (from-to)588-597
Number of pages10
JournalPhysical mesomechanics
Volume24
DOIs
Publication statusPublished - 25 Oct 2021

Keywords

  • crystal plasticity
  • crystal orientation
  • hydrogen embrittlement
  • void growth
  • plastic deformation

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