Hydrogen Embrittlement Understood

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Recent advances on hydrogen embrittlement of structural materials (2015, background): “Even further from the fracture surface (∼3 mm), the microstructure still consists of dislocation cells, though slightly larger, supporting the idea that the deformation is widespread and not limited to the crack tip region (Robertson et al. 2015).”
Hydrogen assisted crack initiation and propagation in a nickel-based superalloy (2016, result): “More importantly, they flagged up that the dislocation substructure in the hydrogen containing material is finer than in the one without hydrogen [24,27,28], which provides further support for the HELP mechanism.”
Strain gradient plasticity-based modeling of hydrogen environment assisted cracking (2016, background): “hydrogen-enhanced decohesion (HEDE) [9].”
Catalytic ammonia decomposition for hydrogen production on Ni, Ru and Ni Ru supported on CeO2 (2019, background): “In addition, hydrogen tends to diffuse through the material which is used to contain and transport it, resulting in embrittlement of the storage material [9-10].”
The mechanism of hydrogen embrittlement in intercritically annealed medium Mn TRIP steel (2016, neutral): “severely H-charged steels with a high current density of ~500 Am 2 [23,37], where blisters form on the specimen surface, it”