- Titel: Hydrogen diffusivity, uptake and embrittlement of solution annealed and cold deformed austenitic stainless steel 1.4435 at hydrogen pressures up to 1000 bar and 200 °C
- Authors: Matthias Eichinger, Johann Pengg, Dino Zwittnig, Gregor Mori
- Journal: Corrosion Science
Abstract:
Austenitic stainless steel 1.4435, a candidate material for high-pressure tubing for hydrogen applications, was investigated in two different stages of cold deformation (0 and 27 %) regarding its hydrogen embrittlement tendency. The determination of effective diffusion coefficients revealed slightly increased diffusion kinetics at 60 C for the cold-reduced material (8.0 ⋅ 10 15 m 2 /s) compared to the solution annealed one (5.0 ⋅ 10 15 /s). High-pressure gaseous hydrogen charging shows no differences regarding the degree of cold deformation with a maximum hydrogen concentration of 112 wt.-ppm. Furthermore, a significant ductility loss expressed by the ratio of the reduction of area was observed.
https://doi.org/10.1016/j.corsci.2024.112219
