Hydrogen embrittlement in metals

© Photo Fraunhofer IWM

Atomic hydrogen is capable of significantly reducing the ductility of metals. This can cause components to fail unexpectedly. The potential risk is generally related to the diffusible portion of the hydrogen. In order to predict the effects of hydrogen on material and component behavior via numerical simulations, we determine the dependence of the hydrogen diffusion constants on mechanical stress and temperature. The effects of hydrogen on the mechanical parameters of a metal are also investigated and assessed by in-situ hydrogen loading in special tensile testing machines.

Casajus, P.; Winzer, N.; Intergranular stress corrosion crack propagation in rolled AZ31 Mg alloy sheet; Materials Science and Engineering A 602 (2014) 58–67

Casajus, P.; Höpfel, H.; Winzer, N.; Development of a Generalised Understanding of Environmentally‐Assisted Degradation of Magnesium‐Aluminium Alloys; in: Magnesium Technology 2014, M. Alderman, Manuel, M.V.; Hort, N.; Neelameggham N.R. (Eds.); Wiley (2014)

Winzer, N., Mrovec, M.; Di Stefano, D.; Katzarov, I.; Paxton, A., Industrially-relevant multiscale modelling of hydrogen assisted degradation, Hydrogen-Materials Interactions: Proceedings of of the 2012 International Hydrogen Conference ICH 2012; Somerday, B. ; Sofronis, P. (Eds.); ASME Press, New York, NY, USA (2014) 737-745

Winzer, N.; Khader, I.; Hydrogen diffusion and trapping in bodies undergoing rolling contact; Wear 303/1-2 (2013) 451-458; 364/2013