Browsing NTNU Open by Author "Torgersen, Jan"
Now showing items 1-20 of 65
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3D Printing and Carbonization of High Performing Polyimide Formulations
Cappelen, Fredrik (Master thesis, 2019)Stereolitografisk 3D-printing (SLA) er en moden form for additiv tilvirkning, og blir i økende grad brukt til produksjon av deler som inngår i et ferdig produkt. I denne oppgaven utforskes muligheten for å bruke SLA til ... -
40CrMoV13.9 notched specimens under multiaxial fatigue: An overview of recent results
Razavi, Seyed Mohammed Javad; Peron, Mirco; Torgersen, Jan; Berto, Filippo; Welo, Torgeir (Journal article; Peer reviewed, 2017)The multiaxial fatigue strength of circumferentially V-notched and semicircular notched specimens made of 40CrMoV13.9 has been investigated in this paper. The multiaxial load were applied using combined tension and torsion ... -
A novel approach for assessing the fatigue behavior of PEEK in a physiologically relevant environment
Peron, Mirco; Torgersen, Jan; Berto, Filippo (Journal article; Peer reviewed, 2018)In recent years, the need of surgical procedures has continuously increased and, therefore, researchers and clinicians are broadly focusing on the development of new biocompatible materials. Among them, polyetheretherketone ... -
Advancing Additive Manufacturing Technology for Production
Strømsnes, Stig (Master thesis, 2018)In this master s thesis we consider three different areas of research in the advancement of AM technology for production environments: In the first we assembled and made a case for the use of a SLA/ DLP 3D-printer at our ... -
ALD Zn(O,S) Thin Films’ Interfacial Chemical and Structural Configuration Probed by XAS
Dadlani, Anup; Acharya, Shinjita; Trejo, Orlando; Fritz, Prinz; Torgersen, Jan (Journal article; Peer reviewed, 2016)The ability to precisely control interfaces of atomic layer deposited (ALD) zinc oxysulfide (Zn(O,S)) buffer layers to other layers allows precise tuning of solar cell performance. The O K- and S K-edge X-ray absorption ... -
Assessment of tensile and fatigue behavior of PEEK specimens in a physiologically relevant environment
Peron, Mirco; Torgersen, Jan; Berto, Filippo (Journal article; Peer reviewed, 2019)In the last decades the necessity of implant devices is continuously increasing. The researchers have thus focused their attentions on the development of new biocompatible materials, in particular polymers. Among them, ... -
Atomic layer deposition by reaction of molecular oxygen with tetrakisdimethylamido-metal precursors
Provine, J; Schindler, Peter; Torgersen, Jan; Hyo Jin, Kim; Karnthaler, Hans-Peter; Prinz, Fritz (Journal article; Peer reviewed, 2016)Tetrakisdimethylamido (TDMA) based precursors are commonly used to deposit metal oxides such as TiO2, ZrO2, and HfO2 by means of chemical vapor deposition and atomic layer deposition (ALD). Both thermal and plasma enhanced ... -
Beyond the 2D limit: étendue-squeezing line-focus solar concentrators
Johnsen, Håkon Jarand Dugstad; Aksnes, Astrid; Torgersen, Jan (Peer reviewed; Journal article, 2020)Line-focus solar concentrators are commonly designed by extruding a two-dimensional concentrator in the third dimension. For concentration in air, these concentrators are, by the nature of their design, limited by the ... -
Biocorrosion Resistance of Mg AZ31 alloy Nanocoated with ZrO2, HfO2 and TiO2 by Atomic Layer Deposition Method
Bjelland, Maria (Master thesis, 2019)Magnesiumlegeringer med sin utmerkede kombinasjon av mekaniske egenskaper og biokompatibilitet, gjør dem egnet for biomedisinske implantater. Imidlertid begrenser deres høye korrosjonsrate i menneskekroppsmiljøet deres ... -
Brake Caliper Design for a Formula Student Race Car - On Behalf of Revolve NTNU
Vasseljen, Brage (Master thesis, 2018)With the large amount of dynamic loads and heat the brake system of a Formula Student race car experiences, the system requires resistance to both heat and external loads in several of its components. The brake caliper, ... -
Comparing physiologically relevant corrosion performances of Mg AZ31 alloy protected by ALD and sputter coated TiO2
Peron, Mirco; Bin Afif, Abdulla Shaikh Abdul Qader; Dadlani, Anup; Berto, Filippo; Torgersen, Jan (Peer reviewed; Journal article, 2020)The utilization of Mg alloys for biomedical applications is so far underexplored due to the accelerated corrosion hampering patient recovery post implantation. Here, we explore the effectiveness of corrosion reduction of ... -
A Comparison Between Topology Optimized and Conventionally Designed Titanium Uprights - On Behalf of Revolve NTNU
Herstad, Thomas (Master thesis, 2018)This thesis covers the design and manufacturing of uprights for Revolve NTNU's 2018 Formula Student car, Atmos. Four titanium uprights have been designed using topology optimization, and produced using additive manufacturing ... -
Conductivity control via minimally invasive anti-Frenkel defects in a functional oxide
Evans, Donald; Holstad, Theodor Secanell; Mosberg, Aleksander Buseth; Småbråten, Didrik Rene; Vullum, Per Erik; Dadlani, Anup; Shapovalov, Konstantin; Yan, Zewu; Bourret, Edith; Gao, David Zhe; Akola, Jaakko; Torgersen, Jan; Van Helvoort, Antonius; Selbach, Sverre Magnus; Meier, Dennis (Peer reviewed; Journal article, 2020)Utilizing quantum effects in complex oxides, such as magnetism, multiferroicity and superconductivity, requires atomic-level control of the material’s structure and composition. In contrast, the continuous conductivity ... -
Creep behavior of v-notched components
Gallo, P; Razavi, Seyed Mohammed Javad; Peron, Mirco; Torgersen, Jan; Berto, Filippo (Journal article; Peer reviewed, 2017)Geometrical discontinues such as notches play a significant rule in structural integrity of the components, especially when the component is subjected to very severe conditions, such as the high temperature fatigue or ... -
Development of Hybrid Aluminum Carbon Fiber Composite Wheels for a Formula Style Race Car
Oldeide, Christer Kobbevik (Master thesis, 2017)Modern short product life cycles and the necessity to rapidly manufacture components with minimal production needs poses stringent requirements on both time and sophistication of modern product design. Light weight components ... -
Differentiation and Bone Deposition of Bone Marrow Derived Stem Cells on Additive Manufactured Porous Ti-6Al-4V Scaffolds
Jøraholmen, Timothy (Master thesis, 2017)The number of arthroplasty surgeries, or joint replacing surgeries, being performed each year is increasing worldwide. Younger patients are also being increasingly introduced to this kind of surgery, which means that the ... -
Dynamic and Process Dependent Integrity Investigations of a Topology Optimized Additive Manufactured AlSi10Mg Upright
Skoglund, Truls Mentzoni (Master thesis, 2019)Additiv tilvirkning muliggjør for tilvirkning av komponenter med organisk geometri. Kombinert med strukturell optimalisering, kan nye komponenter med lav vekt optimalisert for å takle spesifikke lastsitasjoner produseres. ... -
The effect of Equal Channel Angular Pressing on the stress corrosion cracking susceptibility of AZ31 alloy in simulated body fluid
Peron, Mirco; Skaret, Pål Christian; Fabrizi, Alberto; Varone, Alessandra; Montanari, Roberto; Roven, Hans Jørgen; Ferro, Paolo; Berto, Filippo; Torgersen, Jan (Peer reviewed; Journal article, 2020)Despite the great potential of Mg and its alloys as material for biodegradable implants, their low resistance to the simultaneous action of corrosion and mechanical stresses in the human body have hampered their use. Stress ... -
Effect of hot dip galvanization on the fatigue strength of steel bolted connections
Razavi, Seyed Mohammed Javad; Peron, Mirco; Torgersen, Jan; Berto, Filippo; Mutignani, F (Journal article; Peer reviewed, 2017)Hot dip galvanized steel bolted joints has been tested under fatigue loading to evaluate the effect of galvanizing coating on the fatigue strength of S355 structural steel. The experimental results showed that the decrease ... -
Enabling Mobile Additive Manufacturing
Øyen, Martin Øhlund (Master thesis, 2017)Mobile additive manufacturing (AM) is a promising concept to overcome logistic barriers ensuring continuous and quick supply of parts directly at the site of interest. AM has the ability to produce complex parts directly ...