Gregor Mori
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View article: Diffusion and Critical Hydrogen Content of Carbon Steels with Different Strengths and Microstructures
Diffusion and Critical Hydrogen Content of Carbon Steels with Different Strengths and Microstructures Open
Four thermomechanically rolled carbon steels with different strength levels and microstructures, namely S355M, X65M, S960M, and S1100M, were selected, and their critical hydrogen contents Hcrit were determined. Hcrit is the hydrogen conten…
View article: Hydrogen–Dislocation Interactions at Cryogenic Temperatures: Serrated Yielding and Embrittlement Resistance in High-Strength Austenitic Alloys
Hydrogen–Dislocation Interactions at Cryogenic Temperatures: Serrated Yielding and Embrittlement Resistance in High-Strength Austenitic Alloys Open
Comprehensive studies of hydrogen embrittlement in high-strength austenitic alloys under cryogenic conditions are scarce, leaving the combined effect of hydrogen charging and extreme temperatures largely unexplored. Given the demands of cr…
View article: Achieving Complex Nanostructures: The Role of Hydrogen in Controlling Mechanical Alloying and Microstructure Evolution in the TiVZrNbHf‐Cu System
Achieving Complex Nanostructures: The Role of Hydrogen in Controlling Mechanical Alloying and Microstructure Evolution in the TiVZrNbHf‐Cu System Open
Hydrogen is key in reducing greenhouse gas emissions in materials production. At the same time, it significantly affects mechanical properties, often causing unwanted embrittlement. However, rather than solely addressing these disadvantage…
View article: Assessment of the suitability of an existing L360NB natural gas pipeline for hydrogen transport using the hollow specimen technique
Assessment of the suitability of an existing L360NB natural gas pipeline for hydrogen transport using the hollow specimen technique Open
Evaluating the efficiency and suitability of the existing natural gas transport and storage infrastructure for hydrogen use is the main key to boost hydrogen implementation. In this research, hollow specimens made of an existing L360NB nat…
View article: Peculiarity of hydrogen absorption in duplex steels: Phase-selective lattice swelling and stress evolution
Peculiarity of hydrogen absorption in duplex steels: Phase-selective lattice swelling and stress evolution Open
Electrochemical hydrogen absorption in duplex steels is not fully understood. In this work, an in-situ synchrotron cross-sectional X-ray micro-diffraction analysis is performed on steel with comparable phase fractions of ferrite and austen…
View article: Mapping elemental solutes at sub-picogram levels during aqueous corrosion of Al alloys using diffusive gradients in thin films (DGT) with LA-ICP-MS
Mapping elemental solutes at sub-picogram levels during aqueous corrosion of Al alloys using diffusive gradients in thin films (DGT) with LA-ICP-MS Open
A novel approach using diffusive gradients in thin films (DGT) with laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) for two-dimensional mapping of elemental solute release at sub-picogram levels during aqueous corro…
View article: Investigations on the hydrogen embrittlement tendency of K55 for underground storage applications using hollow probe specimens
Investigations on the hydrogen embrittlement tendency of K55 for underground storage applications using hollow probe specimens Open
The susceptibility of ferritic pearlitic steel K55 to hydrogen embrittlement in high pressure gas atmospheres was investigated using slow strain rate tests with hollow probe specimens. Therefore, the specimens were charged with an internal…
View article: Influence of Mo content on susceptibility of medium-carbon martensitic high-strength steels to hydrogen embrittlement: single and double Q&T
Influence of Mo content on susceptibility of medium-carbon martensitic high-strength steels to hydrogen embrittlement: single and double Q&T Open
On a global scale there is a tendency to substitute fossil fuels with cleaner and renewable sources of energy. In recent years, hydrogen appears to be a promising alternative to achieve energy transition. In this context, the new infrastru…
View article: On the applicability of carbon steels K55 and L80 for underground hydrogen storage
On the applicability of carbon steels K55 and L80 for underground hydrogen storage Open
To evaluate the possibility of hydrogen storage in depleted gas reservoirs, natural gas storage facilities, aquifers and salt caverns, the applicability of ferritic pearlitic K55 and tempered martensitic L80, both very frequently used as c…
View article: On the hydrogen uptake of line pipe steels L80 and P110 under gaseous hydrogen charging up to 1000 bar and 200 °C
On the hydrogen uptake of line pipe steels L80 and P110 under gaseous hydrogen charging up to 1000 bar and 200 °C Open
Because of increasing demands on hydrogen storage for green energy systems, the applied materials have to withstand severe conditions in terms of hydrogen partial pressure and temperature. The two industrial steel grades L80 and P110 are w…
View article: From unlikely pairings to functional nanocomposites: FeTi–Cu as a model system
From unlikely pairings to functional nanocomposites: FeTi–Cu as a model system Open
In order to develop materials for energy storage, a bulk nanocomposite with a composition of FeTi-25 vol% Cu was prepared by high-pressure torsion, with FeTi as functional phase for hydrogen storage and Cu as ductile phase to improve the p…
View article: Inhibition of grain growth by pearlite improves hydrogen embrittlement susceptibility of the ultra-low carbon ferritic steel: the influence of H-assisted crack initiation and propagation mechanisms
Inhibition of grain growth by pearlite improves hydrogen embrittlement susceptibility of the ultra-low carbon ferritic steel: the influence of H-assisted crack initiation and propagation mechanisms Open
The influence of grain growth inhibition by pearlite on hydrogen embrittlement (HE) behavior of ultra-low carbon ferritic steels was studied. The Fe-0.02C alloy has a considerable sensitivity to HE, while the Fe and Fe-0.1C materials have …
View article: On the Change in Hydrogen Diffusion and Trapping Behaviour of Pearlitic Rail Steel at Different Stages of Production
On the Change in Hydrogen Diffusion and Trapping Behaviour of Pearlitic Rail Steel at Different Stages of Production Open
To avoid hydrogen flaking in rail production, it is of crucial importance to understand the differences in hydrogen diffusion and trapping between different production steps. Therefore, as-cast unfinished material was compared with two fin…
View article: Hydrogen resistance and trapping behaviour of a cold-drawn ferritic–pearlitic steel wire
Hydrogen resistance and trapping behaviour of a cold-drawn ferritic–pearlitic steel wire Open
The present work investigates the resistance of a progressively cold-drawn carbon steel wire against hydrogen embrittlement. In this study, analytical and numerical methods are used to determine the critical hydrogen content, the critical …
View article: Hydrogen embrittlement characteristics in cold-drawn high-strength stainless steel wires
Hydrogen embrittlement characteristics in cold-drawn high-strength stainless steel wires Open
Hydrogen uptake and embrittlement characteristics of a cold-drawn austenitic stainless steel wire were investigated. Slow strain rate testing and fracture surface analysis were applied to determine the hydrogen embrittlement resistance, pr…
View article: Corrosion of 1.4016 Ferritic Steel by Urea at High Temperature
Corrosion of 1.4016 Ferritic Steel by Urea at High Temperature Open
The corrosion behavior of a ferritic unstabilized stainless steel 1.4016 during decomposition of aqueous urea solution at high temperature has been investigated. Corrosion was obtained from 100 h of cyclic heating (from room temperature up…
View article: Mechanisms of hydrogen absorption, trapping and release during galvanostatic anodization of high-strength aluminum alloys
Mechanisms of hydrogen absorption, trapping and release during galvanostatic anodization of high-strength aluminum alloys Open
The initial growth of a porous alumina layer and the hydrogen absorption during galvanostatic anodization were studied using high-resolution electron microscopy, thermal desorption spectroscopy, and hydrogen microprint technique. The nanos…
View article: Effect of cold deformation on the stress corrosion cracking resistance of a high-strength stainless steel
Effect of cold deformation on the stress corrosion cracking resistance of a high-strength stainless steel Open
The resistance to chloride-induced stress corrosion cracking was investigated on a high-strength CrNiMnMoN austenitic stainless steel in the hot-rolled and in different cold-drawn states. The resistance against chloride-induced stress corr…