Roy Johnsen

TL;DR: In this article, a review based on classic and recent published literature regarding hydrogen diffusion and hydrogen assisted cracking in stainless steels is presented and reviewed as a possible method for building a bridge between the modelling of micro mechanisms in the fracture process zone and the global fracture response.

TL;DR: The cathodic properties of a number of stainless steels, which were exposed to natural seawater flowing at 0 to 2.5 m/s and polarized to potentials from −300 to −950 mV SCE, have been studied as discussed by the authors.

TL;DR: In this article, the in situ effect of electrochemically charged hydrogen on the mechanical properties of austenitic stainless steel (ASS) was studied and a novel analysis method based on the Taylor assumption and the indentation size effect was used to calculate the effect of hydrogen on lattice friction.

TL;DR: In this paper, an overview of trends in materials and corrosion research and development, with focus on subsea production but applicable to the entire industry, is presented, focusing on environmentally assisted cracking of high strength alloys and advanced characterization techniques based on in situ electrochemical nanoindentation and cantilever bending testing for the study of microstructure-environment interactions.

TL;DR: In this paper, the suitability of the linear and polynomial cohesive laws in predicting hydrogen induced stress cracking was investigated by applying models of U and V-notched tensile specimens representing a 25%Cr duplex stainless steel component submerged in sea water under cathodic protection.