Browsing NTNU Open by Title
Now showing items 44736-44755 of 101541
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Hydrogen cyanide, a key plant defense, as a potential driver of root-associated nematode communities along urbanization gradients
(Peer reviewed; Journal article, 2023)Introduction: Plant chemical defenses can influence the distribution, community composition, and abundance of soil biota. Urbanization plays a key role in shaping soil biotic communities either directly through changes in ... -
Hydrogen dependence of the reaction mechanism and kinetics of water gas shift reaction on Ni catalyst: Experimental and DFT study
(Journal article; Peer reviewed, 2019)This paper presents a combined experimental and density functional theory study of the relative reactivity of surface species O*, OH*, and H* with CO* on nickel catalysts and their catalytic consequence in reaction mechanism ... -
Hydrogen diffusion in C 1 ′ phase clathrate hydrate
(Peer reviewed; Journal article, 2023) -
Hydrogen dissociation under equilibrium and non-equilibrium conditions A study using molecular dynamics
(Doctoral thesis at NTNU;2014:323, Doctoral thesis, 2014)The aim of this thesis project was to model reactions using classical molecular dynamics simulations under both equilibrium and non-equilibrium conditions and to study the effect of the reaction on the transport properties ... -
Hydrogen Electric Airplanes: A Disruptive Technological Path to Clean Up the Aviation Sector
(Peer reviewed; Journal article, 2021)Recently, the COVID-19 pandemic has been a painful reminder of the vulnerability of the aerospace industry. It is currently facing challenges with costs, expensive fuels, and carbon emissions. In recovering the industry, ... -
Hydrogen embrittlement and corrosion evaluation of Alloy 725 alloyed with B and Cu
(Doctoral theses at NTNU;2023:40, Doctoral thesis, 2023)The need to achieve materials with higher strength and better corrosion resistance results in producing new alloys. Nickel base alloys are among the materials which have been subjected to several studies related to producing ... -
Hydrogen Embrittlement as a Conspicuous Material Challenge─Comprehensive Review and Future Directions
(Peer reviewed; Journal article, 2024)Hydrogen is considered a clean and efficient energy carrier crucial for shaping the net-zero future. Large-scale production, transportation, storage, and use of green hydrogen are expected to be undertaken in the coming ... -
Hydrogen embrittlement effect observed by in-situ hydrogen plasma charging on a ferritic alloy
(Journal article; Peer reviewed, 2018)To study the hydrogen embrittlement (HE) effect, a novel in-situ slow strain rate tensile test together with in-situ hydrogen (H) charging by H-plasma was conducted in an environmental scanning electron microscope (ESEM). ... -
Hydrogen Embrittlement in Fe3%Si, Visited by Nanomechanical Testing and Cohesive Zone Simulation
(Chapter, 2016)This work is part of a multi scale computational and experimental approach in which first principle modelling, nanoscale experiments and continuum simulations are combined in order to represent hydrogen induced degradation ... -
Hydrogen embrittlement in steels: predictive models and integrity assessment
(Doctoral theses at NTNU;2023:123, Doctoral thesis, 2023)Hydrogen embrittlement (HE) is a well-recognized challenge as it can degrade the mechanical properties of most structural steels, leading to premature failure of hydrogen infrastructures. Continuum scale simulation is an ... -
Hydrogen embrittlement in subsea pipelines made from X70: Effect of plastic deformation on hydrogen diffusion
(Master thesis, 2011)As a part of the DEEPIT project at SINTEF, hydrogen permeation tests have been carried out on API X70 pipeline steel. The effect of plastic deformationon hydrogen diffusion properties has been evaluated, using a worldwide ... -
Hydrogen Embrittlement of 25Cr duplex stainless steel exposed to well fluid with H2S - effect of cold working and product form
(Master thesis, 2017)It is known that cold deformation may have detrimental effects on resistance against SulphideStress Cracking/Stress Corrosion Cracking and Hydrogen Induced Stress Cracking. Thoughit is clear that cold deformation should ... -
Hydrogen embrittlement of additively manufactured AlCoCrFeNi2.1 eutectic high-entropy alloy
(Peer reviewed; Journal article, 2022)AlCoCrFeNi2.1 eutectic high-entropy alloy (HEA) was fabricated in as-cast and additively manufactured (AM) states. The hydrogen embrittlement susceptibility of both materials was investigated through in-situ uniaxial tensile ... -
Hydrogen embrittlement of clad steel pipes: Experiments and FE modelling
(Doctoral theses at NTNU;2018:200, Doctoral thesis, 2018)Pipes with an inner layer of corrosion resistant alloy, so called clad pipes, are increasingly used in the oil and gas industry as en economical viable option for corrosion management, combining the mechanical properties ... -
Hydrogen embrittlement revealed via novel in situ fracture experiments using notched micro-cantilever specimens
(Journal article, 2018)The susceptibility of the FeAl intermetallic alloy to hydrogen-assisted cracking was investigated by in situ fracture experiments using notched micrometre-sized specimens using an Environmental Scanning Electron Microscope ... -
Hydrogen embrittlement suceptibility of steel armour wires for flexible pipes
(Peer reviewed; Journal article, 2020)Flexible pipes are frequently used both as flowlines and risers in the oil and gas industry. A flexible pipe has a complex structure consisting of layers of polymer and metallic materials. The armor wire layers – shielded ... -
Hydrogen Enhanced Fatigue Crack Growth Rates in a Ferritic Fe-3wt%Si Alloy
(Journal article; Peer reviewed, 2018)It is well known that the presence of hydrogen in ferrous materials promotes both static fracture and affect the material fatigue crack growth rates. The latter is often referred to as Hydrogen Enhanced Fatigue Crack Growth ... -
Hydrogen enhanced fatigue crack growth rates in a ferritic Fe-3 wt%Si alloy and a X70 pipeline steel
(Journal article; Peer reviewed, 2019)It is well known that ferrous materials can be damaged by absorption of hydrogen. If a sufficient quantity of hydrogen penetrates into the material, static fracture and the material's fatigue performances can be affected ... -
Hydrogen Fireball Consequence Analysis
(Peer reviewed; Journal article, 2020)A fireball may occur after the catastrophic rupture of a tank containing a flammable substance such as a fuel, if an ignition source is present. The fireball is identified by the combustion of the flammable cloud created ... -
Hydrogen for å skape nettfleksibilitet til landstrømanlegg ved Trondheim Havn
(Bachelor thesis, 2023)Cruiseindustrien hadde i 2021 et utslipp på omtrent 300 000tonn CO2-ekvivalenter. Det meste kommer fra skipenes fremdrift, men de fleste skip må idag benytte seg av dieselgeneratorer i anløp. Det er estimert et utslipp på ...