Effects of ferrite/pearlite alignment on the hydrogen permeation in a AISI 4130 steel

L. Tau, S. L.I. Chan

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

The effects of banded and random ferrite/pearlite structure on hydrogen permeation in AISI 4130 steel plate have been investigated. Since the pearlitic blocks act as a barrier to hydrogen diffusion, the hydrogen diffusivity in the banded structure was found to be highly anisotropic. In the random ferrite/pearlite structure, hydrogen can diffuse in all directions, thus the hydrogen diffusivities of a random ferrite/pearlite structure were higher than those along the transverse and through-surface directions of a banded ferrite/pearlite structure, but lower than that along the longitudinal direction of a banded structure, where hydrogen can diffuse undisturbed along the ferrite bands.

Original languageEnglish
Pages (from-to)143-147
Number of pages5
JournalMaterials Letters
Volume29
Issue number1-3
DOIs
StatePublished - Nov 1996

Keywords

  • Anisotropy
  • Banded microstructure
  • Ferrite/pearlite alignment
  • Hydrogen diffusivity
  • Hydrogen embrittlement
  • Hydrogen permeation
  • Steel

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