Pipeline corrosion is a major challenge facing many oil and gas industries today because of
the enormous downtime associated with corrosion related failures. Fatigue stress initiation in …

Positron is an excellent probe of lattice defects in solids. A thermallized positron delocalized
in lattice can be trapped at open volume defects, eg vacancies, dislocations, grain …

Ever more stringent regulations on greenhouse gas emissions from transportation motivate
efforts to revisit materials used for vehicles. High-strength aluminium alloys often used in …

We reveal the microscopic vacancy trap** mechanism for H bubble formation in W based
on first-principles calculations of the energetics of H-vacancy interaction and the kinetics of …

First documented in 1875, the deterioration of mechanical properties of hydrogen-containing
metals is a longstanding yet unsolved problem in materials science. In this work, the …

Atomistic simulations of the effects of H on edge dislocation mobility and pile-ups are
performed to investigate possible nanoscale mechanisms for hydrogen-enhanced localized …

Determining the long-term corrosion fatigue strength of structural materials in service
conditions is one of the most significant problems of the design engineer. Synergistic …

Premature failure due to hydrogen has been widely observed in different metallic materials.
How does hydrogen affect the competition between brittle cleavage and ductile fracture is an …

The embrittlement of metallic systems by hydrogen is a widespread phenomenon but the
precise role of hydrogen in this process is not well understood and predictive mechanisms …

Due to its high diffusivity, hydrogen is often considered a weak inhibitor or even a promoter
of dislocation movements in metals and alloys. By quantitative mechanical tests in an …