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 language | English |
|---|---|
| Pages (from-to) | 143-147 |
| Number of pages | 5 |
| Journal | Materials Letters |
| Volume | 29 |
| Issue number | 1-3 |
| DOIs | |
| State | Published - Nov 1996 |
Keywords
- Anisotropy
- Banded microstructure
- Ferrite/pearlite alignment
- Hydrogen diffusivity
- Hydrogen embrittlement
- Hydrogen permeation
- Steel