Browsing Fakultet for ingeniørvitenskap (IV) by Title
Now showing items 10453-10472 of 22996
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Hydrogen in the maritime
(Book, 2021)Hydrogen in the maritime is a deliverable under IEA TCP Hydrogen and investigates the use of hydrogen as a fuel in shipping. -
Hydrogen Induced Stress Cracking of Additive Manufactured Components made from Alloy 625 and 25Cr Super Duplex Stainless Steel
(Master thesis, 2022)Denne masteroppgaven har som mål å bidra til økt forståelse rundt hvordan 3D-printede komponenter produsert ved selektiv lasersmelting (SLM) blir påvirket av hydrogensprøhet (HISC). Både 25Cr super duplex rustfritt stål ... -
Hydrogen Induced Stress Cracking of Inconel 718 under Cathodic Polarization - Effects of Hydrogen on the Initiation and Propagation of Cracks
(Master thesis, 2015)This work has examined the susceptibility to hydrogen induced stress cracking (HISC) of Inconel 718 (UNS N07718) by stepwise tensile loading tests with in situ cathodic polarization. Specifically, the effect of hydrogen ... -
Hydrogen Induced Stress Cracking Resistance of Nickel Alloy ATI 830
(Master thesis, 2018)The following activities shall be included in the project: ATI 830 1. Document microstructure and mechanical properties for the received alloy. 2. Execute the test program given in Attachment 1. 3. Execute a literature ... -
Hydrogen Induced Stress Cracking susceptibility of strain-hardened Ni alloys Sanicro 35 and Alloy 750 HS
(Master thesis, 2023)I dette arbeidet er mottakeligheten for hydrogenindusert sprekking (HISC) blitt undersøkt og sammenlignet for to arbeidsherdede nikkelbaserte legeringer, Sanicro 35 (UNS N08935) og høystyrket P750 (DIN nr. 1.4675). Dette ... -
Hydrogen informed Gurson model for hydrogen embrittlement simulation
(Journal article; Peer reviewed, 2019)Hydrogen-microvoid interactions were studied via unit cell analyses with different hydrogen concentrations. The absolute failure strain decreases with hydrogen concentration, but the failure loci were found to follow the ... -
Hydrogen permeation in 13% Crsuper martensitic stainless steel and API X70 pipeline steel
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:208, Doctoral thesis, 2010)Hydrogen permeation measurements have been carried out on 13% Cr super martensitic stainless steel (SMSS), API X70 steel and type HBQ Coreweld under cathodic charging conditions at temperatures from 5°C to 80°C. In addition, ... -
Hydrogen production by water splitting using gas switching technology
(Peer reviewed; Journal article, 2020)This study demonstrates a novel“Gas Switching Water Splitting (GSWS)”technology for production of pure H2with integrated CO2capture. The reactor concept is based on the chemical looping technology where an oxygencarrier ... -
Hydrogen production from methanol partial oxidation through the catalyst prepared using torrefaction liquid products
(Peer reviewed; Journal article, 2020)This study developed a novel application of torrefaction liquid products (TLPs) for acidic catalyst sol-gel synthesis of SiO2 from tetraethyl orthosilicate (TEOS) to improve the thermal stability of Al2O3 catalyst supporter. ... -
Hydrogen som energibærer på Raumabanen
(Bachelor thesis, 2022)Abstract will be available on 2024-06-14 -
Hydrogen Storage: Thermophysical data and flow properties for some porous media
(Master thesis, 2010)Two rigs have been developed and built to measure thermal conductivity and permeability for porous materials. The intention of the rigs is to investigate the properties of some hydrogen adsorption materials. The materials ... -
Hydrogen stress cracking and crack initiation in precipitation hardened Ni-alloys
(Journal article; Peer reviewed, 2018)The two different precipitation hardened nickel alloys, Alloy 718 and Alloy 725, were tested in its as received condition. Their susceptibility to hydrogen stress cracking was examined by the use of stepwise increasing ... -
Hydrogen susceptibility of an interstitial equimolar high-entropy alloy revealed by in-situ electrochemical microcantilever bending test
(Peer reviewed; Journal article, 2019)Hydrogen effect on an interstitial CoCrFeMnNi high-entropy alloy was investigated by micro-cantilever bending tests with pre-notched plane as a case study. Results showed sharp mode I cracks on plane bisecting two planes ... -
Hydrogen trapping and diffusion in polycrystalline nickel: the spectrum of grain boundary segregation
(Peer reviewed; Journal article, 2024)Hydrogen as an interstitial solute at grain boundaries (GBs) can have a catastrophic impact on the mechanical properties of many metals. Despite the global research effort, the underlying hydrogen-GB interactions in ... -
Hydrogen trapping and diffusion in polycrystalline nickel: the spectrum of grain boundary segregation
(Peer reviewed; Journal article, 2023)Hydrogen as an interstitial solute at grain boundaries (GBs) can have a catastrophic impact on the mechanical properties of many metals. Despite the global research effort, the underlying hydrogen-GB interactions in ... -
Hydrogen uptake and diffusivity in steel armor wires with different chemical composition, carbide distribution, grain size, and degree of deformation
(Peer reviewed; Journal article, 2021)In this study, six flexible pipe steel armor wires used in oil and gas transportation are characterized, and their hydrogen diffusion coefficients and hydrogen uptakes are measured using an electrochemical hydrogen permeation ... -
Hydrogen uptake during active CO2-H2S corrosion of carbon steel wires in simulated annulus fluid
(Peer reviewed; Journal article, 2022)The hydrogen uptake of five carbon steel wires exposed to a corrosive CO2/H2S environment where protective film formation was not favorable was measured. The hydrogen uptakes decreased with the accumulation of retained ... -
Hydrogen- og Vannkraftproduksjon - synergier og utfordringer
(Master thesis, 2021)Stryn Sommerski bruker i dag et dieselaggregat for å produsere strøm. Dette gir et utslipp på 61.4 tonn CO2 per år. I tillegg kommer utslipp fra tråkkemaskin og snøskuter. Dette er et betydelig utslipp, og passer dårlig i ... -
Hydrogen-Assisted Cracking Investigated by In Situ Electrochemical Micro-Cantilever Bending Test
(Doctoral theses at NTNU;2018:212, Doctoral thesis, 2018)Most high strength and high performance alloys experience a premature rupture and loss in the ductility when exposed to hydrogen. The interaction of hydrogen with dislocations and other microstructural defects such as ... -
Hydrogen-Assisted Fatigue Crack Growth in Ferritic Steels
(Doctoral theses at NTNU;2019:251, Doctoral thesis, 2019)