Blar i NTNU Open på forfatter "Torgersen, Jan"
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Direct Integration of Strained-Pt Catalysts into Proton-Exchange-Membrane Fuel Cells with Atomic Layer Deposition
Xu, Shicheng; Wang, Zhaoxuan; Dull, Sam; Liu, Yunzhi; Lee, Dong Un; Pacheco, Lezama; Orazov, Marat; Vullum, Per Erik; Dadlani, Anup; Vinogradova, Olga; Schindler, Peter; Tam, Qizhan; Schladt, Thomas; Mueller, Jonathan E.; Kirsch, Sebastian; Huebner, Gerold; Higgins, Drew; Torgersen, Jan; Viswanathan, Venkatasubramanian; Jaramillo, Thomas F; Prinz, Friedrich (Peer reviewed; Journal article, 2021)The design and fabrication of lattice-strained platinum catalysts achieved by removing a soluble core from a platinum shell synthesized via atomic layer deposition, is reported. The remarkable catalytic performance for 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 ... -
Enhancement of stress corrosion cracking of AZ31 magnesium alloy in simulated body fluid thanks to cryogenic machining
Peron, Mirco; bertolini, rachele; ghiotti, andrea; Torgersen, Jan; bruschi, stefania; Berto, Filippo (Journal article; Peer reviewed, 2020)Magnesium and its alloys have recently attracted great attention as potential materials for the manufacture of biodegradable implants. Unfortunately, their inadequate resistance to the simultaneous action of corrosion and ... -
Exploring Minimum Cost Algorithms for Next Generation Manifolds
Røkke, Thomas Malmedal (Master thesis, 2019)Additiv tilvirkning og topologioptimalisering har endret måten å designe produkter. Additiv tilvirkning har nesten ingen designbegrensninger og kan realisere komplekse strukturer. Topologioptimaliserte strukturer har ofte ... -
Exploring the hybrid metal extrusion and bonding process for butt welding of Al–Mg–Si alloys
Sandnes, Lise; Grong, Øystein; Torgersen, Jan; Welo, Torgeir; Berto, Filippo (Journal article; Peer reviewed, 2018)The hybrid metal extrusion and bonding (HYB) process is a new solid-state joining technique developed for aluminum alloys. By the use of filler material addition and plastic deformation sound joints can be produced at ... -
Extending the limits of Pt/C catalysts with passivation-gas-incorporated atomic layer deposition
Xu, Shicheng; Kim, Yongmin; Park, Joonsuk; Higgins, Drew; Shen, Shih-Jia; Thian, Dickson; Provine, John; Torgersen, Jan; Graf, Tanja; Schladt, Thomas; Orazov, Marat; Liu, Bernard Haochih; Prinz, Fritz (Journal article; Peer reviewed, 2018)Controlling the morphology of noble metal nanoparticles during surface depositions is strongly influenced by precursor–substrate and precursor–deposit interactions. Depositions can be improved through a variety of means, ... -
Extracting Key Cross Sections from Triangular Meshes for Memory-Efficient Reverse Engineering in CAD
Molven, Håkon (Master thesis, 2020) -
Fatigue behavior of porous Ti-6Al-4V made by laser-engineered net shaping
Razavi, Seyed Mohammad Javad; Bordonaro, Giancarlo; Ferro, Paolo; Torgersen, Jan; Berto, Filippo (Journal article; Peer reviewed, 2018)The fatigue behavior and fracture mechanisms of additively manufactured Ti-6Al-4V specimens are investigated in this study. Three sets of testing samples were fabricated for the assessment of fatigue life. The first batch ... -
Fatigue design for metallic components produced by additive manufacturing
Solberg, Klas (Doctoral theses at NTNU;2021:25, Doctoral thesis, 2021)Additive manufacturing is a fast-rising manufacturing that brings new possibilities in terms of what has previously been possible in manufacturing. Additive manufacturing is a computer-controlled process where the material ... -
Fatigue strength of blunt V-notched specimens produced by selective laser melting of Ti-6Al-4V
Razavi, Seyed Mohammad Javad; Ferro, P; Berto, Filippo; Torgersen, Jan (Journal article, 2018)Selective Laser Melting (SLM) process is an Additive Manufacturing (AM) technique that allows producing metallic parts of any kind of geometry with densities greater than 99.5%. Complex shapes lead however to notches with ... -
Finish-pass strategy to improve sidewall angle and processing time in FIB milled structures
Lid, Markus Joakim; Bin Afif, Abdulla; Torgersen, Jan; Prinz, Fritz (Peer reviewed; Journal article, 2021)Focused Ion Beams (FIB) systems are employed for their ability to manipulate and remove material on the nanoscale for creating complex structures. By splitting the milling job into multiple sub-patterns, consisting of a ... -
Fracture assessment of magnetostrictive materials
Peron, Mirco; Razavi, Seyed Mohammed Javad; Berto, Filippo; Torgersen, Jan; Colussi, M (Journal article; Peer reviewed, 2017)Giant magnetostrictive materials are gaining interest in the field of smart material, especially the commercially known Terfenol-D, that is an alloy made out of iron, terbium and dysprosium (Tb0.3Dy0.7Fe1.9). Since these ... -
Fracture assessment of PEEK under static loading by means of the local strain energy density
Peron, Mirco; Javad Razavi, Seyed Mohammed; Torgersen, Jan; Berto, Filippo (Journal article; Peer reviewed, 2017)Polyetheretherketone (PEEK) has gained interest in many industrial applications due to its high strength-to-weight ratio, excellent heat tolerance and high corrosion resistance. Stress concentrators such as notches and ... -
Fracture behaviour of notched as-built EBM parts: Characterization and interplay between defects and notch strengthening behaviour
Peron, Mirco; Torgersen, Jan; Ferro, Paolo; Berto, Filippo (Journal article, 2018)Additive manufacturing (AM) offers the potential to economically produce customized components with complex geometries. However, the introduction of complex geometry goes hand in hand with the presence of notches. Thus, ... -
Frontiers of fracture and fatigue: Some recent applications of the local strain energy density
Javad Razavi, Seyed Mohammed; Berto, Filippo; Torgersen, Jan (Journal article; Peer reviewed, 2018)The phenomenon of brittle fracture occurs too often in various branches of engineering being the reason of unexpected termination of anticipated service lives of an engineering objects. This leads to unfortunate catastrophic ... -
High-concentration freeform microtracking concentrators with single-axis external tracking
Johnsen, Håkon Jarand Dugstad; Torgersen, Jan (Chapter, 2023)Microtracking concentrators enable the use of concentrator photovoltaics without the need for accurate two-axis external solar tracking. However, the wide tracking range required from stationary microtracking concentrators ... -
High-concentration wide-angle tracking integration with stacked lens arrays
Johnsen, Håkon Jarand Dugstad; Aksnes, Astrid; Torgersen, Jan (Chapter, 2019)Tracking-integration can reduce or eliminate the need for external solar tracking in CPV (concentrator photovoltaics). Previous research has shown how tracking-integrated systems can achieve high concentration ratios, wide ...