Browsing Institutt for maskinteknikk og produksjon by Subject "Materialteknologi, Materialutvikling og -bruk"
Now showing items 1-20 of 21
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A Combined Gurson-RKR Model for the Ductile to Brittle Transition in Steel
(Master thesis, 2017)The goal of this work was to establish a simulation scheme that incorporates both ductile and brittle fracture modes with respect to temperature in order to describe the aforementioned toughness dependency on temperature. ... -
Advanced small-scale characterization of hydrogen embrittlement
(Master thesis, 2016)A large amount of micro-cantilevers were made using a focused ion beam (FIB) microscope. The cantilevers were made to be tested under cyclic loading in a triboindenter to determine the hydrogen effect on the grain boundaries ... -
Atomistic Modeling of Dislocations in Nanopillars
(Master thesis, 2015)In this master s thesis, atomistic simulations of displacement controlled compression were performed on nanopillars consisting of pure iron. The main part of the work has been put into developing compression simulations ... -
Characterization of Non-Metallic Inclusions in Ferritic Weld Metals for Arctic Applications
(Master thesis, 2015)In Arctic applications, structural steel weldments will be subjected to low temperatures, in the worst cases approaching -60 °C. This may be a major challenge, due to the ductile to brittle transition taking place at certain ... -
Corrosion of Nickel-Aluminium Bronze - How does the different alloying elements effect the corrosion properties?
(Master thesis, 2016)This thesis examines the effect of copper, aluminium, iron and nickel on the corrosion properties of Nickel-Aluminium bronze (NAB) in seawater. NAB has a complex microstructure consisting of a copper-rich phase, α, and ... -
Design of Composite Wing Kite
(Master thesis, 2016)New methods to produce environmentally-friendly energy, is a growing technology area. By using wind at high altitudes, Kitemill wants to be a part of this revolution. Operations in the air requires high quality and security ... -
Evaluation of Welded Clad Pipe - Microstructures and Properties
(Master thesis, 2015)Clad pipes are used in the oil and gas industry for transportation of corrosive substances. Maintenance, repairs and tie-in connections to existing subsea structures is done by hyperbaric welding. There is per today no ... -
Failure Mechanisms in Cutter Tools for Tunnel Boring
(Master thesis, 2015)Tunnel boring machines (TBM) utilize cutter discs as a primary tool for cutting through hard rock. The discs are mounted on a rotating, circular cutter head which is pressed against the rock. A microscopical examination ... -
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 ... -
Korrosjonsbeksyttelse av maskinerte ståloverflater
(Master thesis, 2015)Industrien har erfart at maskinerte ståloverflater er vanskelige å beskytte mot korrosjon, da det korrosjonsbeskyttende belegget feiler tidlig. Tidligere ble det antatt at dette skyldes dårlig adhesjon mellom maskinert ... -
Korrosjonsbeskyttelse av Maskinert Stål
(Master thesis, 2016)Det er vanlig praksis å blåserense stål som skal belegges med organisk belegg. Blåserensingen rengjør ståloverflaten og etterlater en overflateruhet som gir god belegglevetid. Maskinerte overflater blir ikke alltid blåserenset ... -
Mechanical Properties of Elastomers at Low Temperatures for Sealing Applications
(Master thesis, 2015)With increased oil and gas activity in low-temperature areas of the world, it is highly important that the industry utilize the most robust materials and zero-leakage solutions. The O ring is a type of elastomer sealer ... -
NANOMECHANICAL TESTING OF CGHAZ OF ARCTIC STEEL
(Master thesis, 2015)An ever increasing demand for energy is forcing the oil industry to push technology forward, as new oil rich fields are discovered further North. The Arctic offers a harsh, cold climate, leading to new challenges within ... -
NANOMECHANICAL TESTING OF ICCGHAZ OF ARCTIC STEEL
(Master thesis, 2015)An ever increasing demand for energy is forcing the oil industry to push technology forward, as new oil rich fields are discovered further North. The Arctic offers a harsh, cold climate, leading to new challenges within ... -
Pitting and Crevice Corrosion of Super Duplex Stainless Steels in Seawater - Effect of Tungsten
(Master thesis, 2015)The need for low cost and lighter materials with higher mechanical and chemical properties has lead to more frequently usage of SDSS because of their increased mechanical and superior corrosion properties compared to other ... -
Producing Steel Fiber Reinforced Polymer Composite Pipes
(Master thesis, 2016)This study has introduced a novel non-annealed stainless steel fiber with 8 $\mu m$ diameter to make a steel fiber reinforced polymer composite pipe. The primary objective was to make the pipes by the filament winding ... -
Repair Coatings for Thermally Sprayed Aluminium
(Master thesis, 2016)Thermally sprayed aluminium (TSA) is widely used for corrosion protection on offshore installations. Rapid degradation of the TSA has earlier been discovered, if organic coating is applied on top of the TSA. In case of ... -
Stress Analysis, Lay-up and Production Process For The Tail Section Of A Composite Glider Used For Energy Generation.
(Master thesis, 2017)Kitemill is developing a new concept to harness wind energy. Their concept is shaped like a glider, and takes advantage of the high wind speeds at high altitudes. Operations in such environments require strong and lightweight ... -
Susceptibility to Hydrogen Induced Stress Cracking of centrifugal cast 25Cr Duplex Stainless Steel
(Master thesis, 2017)Testing of the susceptibility towards hydrogen induced stress cracking (HISC) for five 25\%Cr super duplex stainless steels (SDSS) under cathodic protection (CP) in seawater has been conducted. The materials were from pipes ... -
Tribology Mechanisms in Low-Friction Hardbanding Coatings.
(Master thesis, 2013)As the shallow and easily accessible oil and gas reservoirs are becoming depleted, the oil and gas industry has turned its attention towards the deeper and more remote reservoirs. The increased drilling depth, more complex ...