Blar i NTNU Open på forfatter "Solberg, Jan Ketil"
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As Cast and Rapidly SolidifiedTi-V Alloys for Selective Hydrogen Absorption
Suwarno, Suwarno (Doctoral Theses at NTNU, 1503-8181; 2012:204, Doctoral thesis, 2012)Steam reforming of hydrocarbons is a dominant technology in the commercial production of hydrogen. Hydrogen Sorption Enhanced Reforming (HSER) is a novel concept recently proposed by Statoil, with the aim of increasing the ... -
Ballistic impact of layered and case-hardened steel plates
Holmen, Jens Kristian; Solberg, Jan Ketil; Hopperstad, Odd Sture; Børvik, Tore (Journal article; Peer reviewed, 2017)We investigated the ballistic resistance of hot-rolled structural steel plates with a nominal yield stress of 355 MPa in this study. Ballistic tests were conducted with 7.62mm armor piercing bullets on monolithic and ... -
Case Hardening of Hardox 450 Steel for Increased Ballistic Strength
Buberg, Tor Arne (Master thesis, 2011)AbstractSteel alloys are the material that is most used in protective constructions today. The reason is the overall good properties of steels, with its high strength and hardness, high ductility, high formability and ... -
Effect of Mg content in the La3-xMgxNi9 battery anode alloys on the structural, hydrogen storage and electrochemical properties
Wan, ChuBin; Hu, Weikang; Denys, Roman Volodymyrovich; Nwakwuo, Christopher; Solberg, Jan Ketil; Yartys, Volodymyr (Peer reviewed; Journal article, 2021)The present work is focused on the studies of structure, hydrogen storage and electrochemical properties of the La3-xMgxNi9 (x = 1.0, 1.1 and 1.2) alloys as active materials of negative electrodes in the Nickel-Metal Hydride ... -
Effects of Heat Treatment on Microstructure, Strength and Hardness of F22 Steel
Hassel, Trond Arne (Master thesis, 2013)In offshore oil exploitation, the riser is an important component, linking the installations on the seabed to the surface installations. This master's thesis has looked at the possibility of implementing forge welding in ... -
Effekt av anløpning på de mekaniske egenskapene til et martensittisk rustfritt stål
Aunemo, Jo (Master thesis, 2013)Martensittisk rustfritt stål er ansett som et velegnet materiale til propellblader, turbinskovler og flydeler. Stålet viser god sveisbarhet, styrke og seighet, samtidig som korrosjonsmotstanden betraktes som tilfredsstillende. ... -
Effekt av høyt silisiuminnhold i stål
Sølvberg, Erlend (Master thesis, 2012)Det har i dette arbeidet blitt undersøkt hvilke effekter relativt store mengder silisium har på egenskaper i stål. To ulike deler i stål, tinder og fjærer, som jordbruksselskapet Kverneland Group ASA produserer, har blitt ... -
The fracture toughness of Mg2Si determined by 3-point bending and the indentation microcracking method
Milekhine, Vitali Anatolievich; Solberg, Jan Ketil; Onsøien, Morten Ingar (Peer reviewed; Journal article, 2022)The Mg2Si intermetallic compound was produced from the raw materials by melting in a vacuum furnace. The purity of the as-cast material was 98 vol.%. Continuous polishing of a surface containing microhardness indentation ... -
Intragranular Chromium Nitride Precipitates in Duplex and Superduplex Stainless Steel
Iversen, Torunn Hjulstad (Master thesis, 2012)Intragranular chromium nitrides is a phenomenon with detrimental effects on material properties in superduplex stainless steels which have not received much attention. Precipitation of nitrides occurs when the ferritic ... -
Kimdanning av sprøbrudd i et 420 MPa arktisk stål
Salvesen, Trine Viveke (Master thesis, 2011)Sveising fører til endret mikrostruktur i deler av stålet. I kombinasjon med lave temperaturer oppstår nye forutsetninger for brudd.I denne masteroppgava ble det sett på initiering av sprøbrudd i et sveisesimulert 420 ... -
Kimdanning av sprøbrudd i simulert grovkornet HAZ i et arktisk stål
Brandt, Kristin Roberta (Master thesis, 2012)Det har blitt estimert at 30 % av verdensuoppdagede gassreserver og 13 % av verdens uoppdagede oljereserver ligger i de polare områdene i nord. Man trenger derfor materialer som tåler lave temperaturer for å hente opp denne ... -
Porous Silicon as Anode Material for Li-ion Batteries: Structure and Performance
Ulvestad, Asbjørn (Master thesis, 2013)Silicon has proven to have a great potential as anode material in lithium-ion batteries due to its high theoretical electrochemical capacity. However, silicon anodes deteriorate quickly during cyclic charging and discharging, ... -
SAG-FW Welding of C90 Riser Steel Connectors
Stoss, Aleksander Rudolf (Master thesis, 2012)Weld simulations have been conducted on a C90 quenched tempered steel used in offshore riser systems, in order to investigate the possibility of introducing an effective solid state weld procedure. As a secondary objective, ... -
Secondary Hardening in Two Supermartensitic Stainless Steels
Sømme, Astri (Master thesis, 2012)Since the late nineties weldable supermartensitic stainless steels (SMSS) has been used in subsea flowlines, and more than 400 km is installed. Hydrogen related problems in the weld fabrication stage or hydrogen induced ... -
Shielded Active Gas Forge Welding of an L80 Steel in a Small Scale Shielded Active Gas Forge Welding Machine
Palanisamy, Vinothkumar; Solberg, Jan Ketil; Moe, Per Thomas (Peer reviewed; Journal article, 2021)Abstract: The Shielded Active Gas Forge Welding (SAG-FW) method is a solid-state welding technique in which the mating surfaces are heated by induction heating or direct electrical heating before being forged together to ... -
Stål i beskyttelseskonstruksjoner: Introduksjon av Al2O3 til stålmatriks for økt penetrasjonsmotstand
Larsen, Thomas (Master thesis, 2012)Lette våpen som håndvåpen, rifler og granater står for de fleste dødsfall i moderne konflikter, og behovet for robuste materialer til vern mot slike våpen er stort. Denne rapporten har tatt sikte på å avdekke hvilken effekt ... -
Stål i beskyttelseskonstruksjoner: Settherdet NVE36 konstruksjonsstål til beskyttelsesformål
Coucheron, Aleksander (Master thesis, 2013)Tidligere forskning på 12 mm tykke settherdede plater av kvaliteten NVE36 har vist at settherding kan gi en markant forbedring av de ballistiske egenskapene til ferritt-perlittiske stålplater[1]. De ballistiske egenskapene ... -
Sulfide Stress Corrosion Cracking Resistance of Modified ASTM A694 F60 Low Alloy Steel for Subsea Applications
Stridsklev, Camilla A (Master thesis, 2013)The resistance to sulfide stress corrosion cracking (SSC) of modified ASTM A694 F60 low alloy steel, produced by two different manufacturers, was studied by four-point bend-testing. The two materials are named material A ... -
Synthesis and characterisation of the nanostructured magnesium-lanthanum-nickel alloys for Ni-metal hydride battery applications
Holm, Thomas (Master thesis, 2012)Affordable price, high abundance of magnesium and high densities of hydrogenin the Mg-based hydrides attract interest to these hydrides tailored for hydrogenand energy storage applications. Ternary La-Mg-Ni hydrogen storage ... -
The susceptibility of grade 70 anchor chain steel to HISC
Dahle, Knut Ove (Master thesis, 2011)Due to recent fractures in grade 70 anchor chains in the fish farming industry, chain supplier Erling Haug AS has initiated an examination of a sandblasted anchor they sell today. The sandblasted anchor chain is of the ...