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MM: Fachverband Metall- und Materialphysik

MM 15: Hydrogen in metals III: Experiments

MM 15.1: Topical Talk

Montag, 16. März 2015, 15:45–16:15, TC 006

On the combination of different experimental techniques to increase understanding on the hydrogen/material interaction in iron based alloys — Tom Depover, Elien Wallaert, Aurélie Laureys, Emilie Van den Eeckhout, and •Kim Verbeken — Ghent University, Department of Materials Science and Engineering, Technologiepark 903, B-9052 Ghent (Zwijnaarde)

Hydrogen induced cracking might arise when metals are in contact with an H-containing environment. Although known for a long time, the explanation of the responsible mechanism still remains under discussion. New, high strength metals appear more prone to H-related failure. The microstructure complexity of such metals even complicates the study of H induced phenomena. Moreover, H interacts in a very specific way with each microstructural feature. Furthermore, H-related research is a very challenging task due to the low H solubility, high H mobility and difficult H visualization.

H-material interactions can be studied via evaluating the effect of hydrogen on the mechanical properties, done by tensile tests after or during charging, characterizing H trapping via thermal desorption spectroscopy, studying H diffusion by electrochemical permeation and advanced characterization of H-induced cracks by electron backscatter diffraction. In this work, an overview is given on some recent results on the H-material interactions in iron-based alloys by combining these techniques. It will be demonstrated that the combination of these data is an asset contributing to the elucidation of the complicated H-material interactions.