Hydrogen Embrittlement of High Strength Steels

Javier Sanchez; Jose Fullea; Carmen Andrade; Pedro de Andres

doi:10.4028/www.scientific.net/DDF.289-292.203

Paper Titles

Interrelation between Hydrogen Desorption Kinetics and Structure of (Mg₂Ni)H_x and Hydrogenated Eutectic(Mg/Mg₂Ni)H_y
p.167

Microstructure of the Passive Layer Formed on Different Austenitic Stainless Steels Implanted with Molybdenum
p.175

Synthesis and Characterization of a Porous Silicon Filter with Si₃N₄ Whiskers
p.185

Effect of the Si Additions on the Mechanical Behaviour and High-Temperature Performance of Hydrogen Sintered 434L Stainless Steels
p.195

Hydrogen Embrittlement of High Strength Steels
p.203

Grain Boundary Diffusion of Fe in High-Purity Copper
p.211

Investigation of Phase Transformation of Forged Steel Cold Rolls due to Heat Affecting and Prevent its Failure
p.219

Diffusion Enhanced Rumpling Associated with Martensitic Transformation upon Cycling of Aluminide Bond-Coats
p.227

Diffusion of a Corroding Electrolyte through Defective Electroplated Ceria Based Coatings
p.235

HomeDefect and Diffusion ForumDefect and Diffusion Forum Vols. 289-292Hydrogen Embrittlement of High Strength Steels

Hydrogen Embrittlement of High Strength Steels

Abstract:

Hydrogen embrittlement is believed to be one of the main reasons for cracking of structures under stress. High strength steels in these structures often include a ferritic core made of alpha-iron (body centered cubic lattice). We compute the interaction of atomic hydrogen with iron using first principles. The interstitial hydrogen can be placed in two high symmetry positions: octahedral and tetrahedral sites. Our calculations provide diffusion barriers between these sites. These barriers have been analyzed to understand the propagation of hydrogen through the iron lattice. We analyze how these barriers can be modified by the hydrogen concentration. The results show the main site for high and low hydrogen density and they show the diffusion coefficient variation by the hydrogen density.