Impact of hydrogen and crosshead displacement rate on the martensitic transformations and mechanical properties of 304L stainless steel

Effect of additive manufacturing and subsequent heat and/or surface treatment on the hydrogen embrittlement sensitivity of 316L austenitic stainless steel

“…Thermal desorption spectroscopy (TDS) was used to quantify the apparent hydrogen diffusivity as hydrogen diffusion is the rate-determining step in these face-centered cubic steels. Through modelling of the obtained spectra using Fick's laws for 1D diffusion, a value for the apparent hydrogen diffusion coefficient as a function of temperature can be obtained, as was illustrated in previous work by the authors [29], [30]. The materials were only tested in the polished condition since information on the bulk hydrogen diffusivity was aimed for.…”

“…The specimens had a circular geometry with a diameter of 20 mm and a thickness of 0.2 mm, cf. [30]. The charging procedure was adapted for these specific measurements to be close to a homogeneous hydrogen concentration, which ensures a more reliable fitting of the experimental data.…”