Browsing NTNU Open by Author "Espallargas, Nuria"
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A Comparative Tribocorrosion Study of Additive Manufactured and Wrought 316L Stainless Steel in Simulated Body Fluids
Stendal, Johan; Fergani, Omar; Yamaguchi, Hitomi; Espallargas, Nuria (Journal article; Peer reviewed, 2018)In this study, the corrosion and tribocorrosion behavior of additive manufactured (AM) 316L is investigated and compared to wrought 316L. The experiments were performed in both a 0.9 wt% NaCl solution and a simulated body ... -
Adhesion, Friction and Leakage in Contacts with Elastomers
Tiwari, Avinash (Doctoral theses at NTNU;2018:277, Doctoral thesis, 2018)Adhesion, friction and leakage in contacts with elastomers is central to many technologically demanding applications such as tires, seals, wiper blades and syringes to just name a few. These tribological systems are very ... -
Application and Future Prospects of Thermal Spray SiC Coatings
Vaitkunaite, Gerda (Master thesis, 2017)Thermally sprayed coatings allows to increase base surface functionality and add parameters, which base material did not had before. This feature opens the door to the application and design improvements in leading ... -
Atomic Force Microscopy for Air-Lubrication Surface Solutions
Gran, Tobias Wetlesen (Master thesis, 2020)Abstract will be available on 2023-08-08 -
Carbon Nanostructures as Lubricant Additives
Jansson, Nora (Master thesis, 2021)Friksjon og slitasje mellom overflater i kontakt og relativ bevegelse er viktige kilder til energitap som kan reduseres gjennom bruk av smøremidler. Moderne, flytende smøremidler er komplekse kjemiske systemer som består ... -
Cutter wear mechanisms in hard rock tunnel boring
Macias, Javier; Nærland, Jarand; Espallargas, Nuria (Journal article; Peer reviewed, 2018)Cutter consumption and parameters such as cutter ring wear has a great relevance in the overall excavation time and cost in hard rock tunnel boring machines (TBMs), especially in hard rock conditions. Cutter wear involves ... -
Degradation mechanisms due to wear and corrosion interaction of cutter tools used in Tunnel Boring Mahines.
Krogstad, Erlend (Master thesis, 2013)A better understanding of the wear and corrosion mechanisms at work on the steel cutters during tunnel boring is needed to further improve the use of tunnel boring machines in tunnel excavation.In this master thesis several ... -
Degradation mechanisms of AA 1350 aluminium alloy conductor strands in air and chloride solution
Foggi, Jiregna Hirko (Doctoral theses at NTNU;2020:170, Doctoral thesis, 2020)The primary aim of this doctoral thesis is to investigate the degradation mechanisms contributing to the failure of the aluminium strand material (AA 1350) used in steel reinforced aluminium conductors. These conductors ... -
Design and Build Up of a Tribometer to Work Under Corrosive and Fatigue Conditions for the Offshore Renewable Energy Sector - A Top Sliding Motion Approach
Evensen, Martine; Garen, Solveig So-Sun; Paulsrud, Elin Karlsen (Bachelor thesis, 2024)Et tribometer er et instrument som kan teste hvordan ulike materialer interagerer med hverandre, og det brukes for å studere friksjon og slitasje mellom overflater. Kunnskap om materialers oppførsel under ulike forhold er ... -
Design, Construction and Testing of a Novel Reactor for the Production of Silicon Carbide Powder Feedstock for Thermal Spray
Hansen, Ragnar (Master thesis, 2020)Forbedring av materialegenskaper og maskindeler er et essensielt aspekt i forskjellige bransjer som kontinuerlig utvikler seg. Overflatebehandlinger er konvensjonelle metoder for å forbedre egenskaper, og termisk sprøyting ... -
Designing a High Precision Rotating and Reciprocal Tribometer
Audal, Mathias; Gusfre, Fredrik; Skjerdingstad, Jon Paulsen (Bachelor thesis, 2023)Dette prosjektet har fokusert på design og utvikling av to tribometere for høy presisjon, som er ment å bli brukt på tribologilaben ved Institutt for maskinteknikk og produksjon på NTNU. Målet har vært å bidra til det ... -
Development of a Linear Tribometer
Fenre, Mathis Dahl (Master thesis, 2016)A mobile, linear tribometer for studying frictional characteristics on various materials gliding on snow and ice has been developed. The tribometer has the ability to adjust the normal force on the specimen to simulate ... -
Effect of Contamination on the Friction and Wear of Carboxylic Acids in Aqueous Lubricants
Bernat, Szymon Czeslaw; Armada Nieto, Sergio; Espallargas, Nuria (Journal article; Peer reviewed, 2018)The friction and wear mechanisms of water-based fluids consisting of various types of carboxylic acids have been systematically investigated using a ball-on-disc tribometer on a super duplex stainless steel under boundary ... -
Effect of marine environment on the tribology performance of materials used in lubricated rotating parts of offshore wind turbines
Nyhus, Toril (Master thesis, 2012)The use of offshore wind turbines as a source of renewable energy is promising. However, many challenges have to be solved before they will be cost effective. The operation time, without any maintenance required, is desired ... -
Elastomer viscoelasticity and performance of seals in coldclimate applications
Akulichev, Anton (Doctoral theses at NTNU;2017:295, Doctoral thesis, 2017)The Ph.D. thesis addresses the issues of elastomer seals operating in cold climate areas like Arctic. The work is devoted to a better understanding of low-temperature behaviour of elastomer seals near the glass transition ... -
Environmentally acceptable lubricants (EAL) in the maritime industry
Finnøy, Christer (Master thesis, 2016)All dynamic mechanical equipment needs lubrication to perform in a best possible way. In the maritime industry, e.g. ships, many of the most important dynamic mechanical systems are located beneath the surface of the sea. ... -
Failure Mechanisms in Cutter Tools for Tunnel Boring
Nærland, Jarand (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 ... -
Formulation and Testing of New Environmentally Acceptable Lubricants (EAL) for Use in Maritime Gear Components
Aspnes, Mari Gansmoøy (Master thesis, 2019)I marin industri er lekkasje av smøremidler en stor miljøutfordring. For å redusere slik forurensning til sjøvannet må alle fartøy benytte miljøvennlige smøremidler i all olje til sjø grensesnitt. I disse grensesnittene ... -
Formulation of Enhanced Water-Glycol Lubricants for Offshore Components - The Influence of Thickeners in Environmentally Acceptable Lubricants on the Wear of a Steel Piston Cylinder
Iversen, Jostein (Master thesis, 2016)The service life of offshore stainless steel cylinders used for riser tensioner systems is lower than expected. This is due to the complex degradation mechanisms, like corrosion, wear and fatigue, that take place under the ... -
FRICTION AND WEAR OF COATINGS FOR SUBSEA GATE VALVES OPERATING AT HIGH TEMPERATURE AND PRESSURE
Wesmann, Johan Andre Riis (Doctoral thesis at NTNU;2016:161, Doctoral thesis, 2016)Gate valves for subsea oil and gas operation work under harsh conditions. Proper design ensures the valves functional integrity over the designed lifetime of the valve. The design of the valve includes material choice ...