Publikasjoner og ansvarsområder
On the relation between fatigue and static ductile to brittle transition for weld simulated 420 MPa structural steel
Hydrogen embrittlement in structural steel welds – influence of varying the stress concentration
Hydrogen Embrittlement (HE) has been a known phenomenon for several decades. Despite that, it still represents a critical problem for Carbon Manganese steel used in structural applications. For the particular case of subsea pipelines and their weldments, atomic hydrogen from the cathodic protection ...
H2 in the Norwegian Energy sector
From being mainly a source of damage to steel offshore structures and subsea pipelines, hydrogen is gradually becoming a candidate for energy storage. SINTEF and NTNU play a major role in both research fields....
Fatigue crack growth of a 420 MPa structural steel heat affected zone at low temperatures
A multi-scale approach to grain boundary degradation by hydrogen
Influence of stress concentration on hydrogen embrittlement susceptibility of a X70 weld simulated coarse grained heat affected zone
The deleterious consequences of hydrogen on materials, commonly referred as hydrogen embrittlement (HE), is a well-known phenomenon that can lead to unexpected and sudden structural failures. Therefore HE is of concern for the structural integrity of subsea pipelines and their weldments, where atomi...
Hydrogen embrittlement in nickel, visited by first principles modeling, cohesive zone simulation and nanomechanical testing
Hydrogen (H) can have dramatic consequences on material properties, especially by reducing the fracture toughness. Degradation by H initiates through mechanisms at the nano-scale, and is normally not detectable prior to the final leakage or component fracture. Computational techniques are therefore ...
Fatigue properties of a 420 MPa structural steel at low temperature
The exploration of oil and gas fields in the arctic brings several challenges in the use of structural steels concerning their low-temperature properties. Among others, fatigue behavior needs also to be considered for arctic applications, despite little attention to fatigue at low temperature has be...
FEM formulation for mass diffusion through UMATHT subroutine
This report summarized the development of a Finite Element framework for the description of bulk mass diffusion of a solute (hydrogen) in metallic materials (iron/steels). The implemented governing diffusion law accounts not only for the solute concentration gradients but also for the mechanical sta...