Browsing NTNU Open by Author "Reiso, Oddvin"
Now showing items 1-20 of 25
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Aluminum alloys as reinforcement in concrete constructions: Opportunities and Challenges
Runningen, Ingvild (Master thesis, 2021)Abstract will be available on 2024-06-17 -
Applications of screw extrusion for pure aluminium and aluminium foils
Værnes, Martin Storli (Master thesis, 2018)This thesis has assessed the effect of the screw extrusion process on a super pure aluminium Ø 3mm wire. This thesis also determined that commercial quality aluminium foil can be screw extruded using the prototype found ... -
Characterisation of Feed and Produced Material in Screw Extrusion of Titanium
Meling, Jan Inge Hammer (Master thesis, 2016)A novel method of extrusion of materials with high viscosity is being developed at NTNU, the method is based on screw extrusion, which is more known in the plastic industry. The process, at the end of the development cycle ... -
Characterization and Optimization of AlSi10Mg-Components Produced by Selective Laser Melting
Holm, Håkon Dehli (Master thesis, 2018)The additive manufacturing process known as selective laser melting (SLM) produces metallic parts directly from a computer aided design (CAD)-model, by selectively melting metallic powder particles together in a layer-by-layer ... -
Characterization of Extruded Aluminium Alloys from Ram Extrusion and Screw Extrusion
Kristiansen, Kjetil Houmb (Master thesis, 2020)I denne oppgaven ble skruekstrudering sammenlignet med konvensjonell pressekstrudering for tre 6xxx legeringer. Effekten av ekstrudering og påfølgende varmebehandling ble undersøkt ved optisk mikroskopi, hardhetstesting ... -
Characterization of Screw Extruded Rapid Solidified AA6061
Stedje, Thorstein Jacobsen (Master thesis, 2014)By using rapid solidified aluminium as feedstock and a novel extrusion method, i.e. screw extrusion, it is possible to extrude aluminium continuously. Due to rapid solidification, the base material can have small grain ... -
Characterization of the Microstructural Development through Screw Extrusion of AA6060 and AA6082
Sveen, Ola (Master thesis, 2021)Økt resirkulering av materialer vil spille en avgjørende rolle i å fremskynde overgangen til en mer bærekraftig fremtid og sirkulær økonomi. Skruekstrudering er en nyskapende resirkuleringsteknologi som omdanner skrap til ... -
Directionality and column arrangement principles of precipitates in Al-Mg-Si-(Cu) and Al-Mg-Cu linked to line defect in Al
Andersen, Sigmund Jarle; Marioara, Calin Daniel; Friis, Jesper; Bjørge, Ruben; Du, Qiang; Ringdalen, Inga Gudem; Wenner, Sigurd; Mørtsell, Eva Anne; Holmestad, Randi; Saito, Takeshi; Røyset, Jostein; Reiso, Oddvin (Journal article, 2016)In the structures of all metastable precipitates in Al-Mg-Cu and Al-Mg-Si alloys, we find that column surrounding of an element column in the needle/lath direction order according to simple principles. Advanced transmission ... -
Effect of microstructure on precipitation of β-Mg2Si during cooling of Al-Mg- Si alloys
Hennum, Endre Asheim (Doctoral theses at NTNU;2024:228, Doctoral thesis, 2024)Processing of Al-Mg-Si alloys requires tight control of the various secondary Mg-Si phases that form during the processing steps. In this regard, the cooling stage after homogenisation is a crucial step because of the ... -
Effects of Germanium, Copper, and Silver Substitutions on Hardness and Microstructure in Lean Al-Mg-Si Alloys
Mørtsell, Eva Anne; Marioara, Calin Daniel; Andersen, Sigmund Jarle; Røyset, Jostein; Reiso, Oddvin; Holmestad, Randi (Journal article; Peer reviewed, 2015)It is shown that strength loss in a 6060 Al-Mg-Si alloy caused by reduction in solute can be compensated by adding back smaller quantities of Ag, Ge, and Cu. Nine alloys were investigated. Ge was found to be the most ... -
Effects of iron precipitation and novel metal screw extrusion on electrical conductivity and properties of AA1370 aluminium
Langelandsvik, Geir; Furu, Trond; Reiso, Oddvin; Roven, Hans Jørgen (Journal article; Peer reviewed, 2020)In order to develop well-performing aluminium electrical conductors, the role of iron and processing method on electrical and mechanical properties was studied for an AA1370 alloy. Firstly, Ø3 mm cold drawn wires were ... -
Elektriske ledere av skrueekstrudert aluminium - Effekt av kjemisk sammensetning, termo-mekanisk bearbeiding og deformasjon
Ebbesen, Lasse Holm (Master thesis, 2016)Skrueekstrudering av aluminium er en ny og unik metode for å oppnå kontinuerlig ekstrudering av aluminium. Det er veldig aktuelt å kunne utnytte restaluminium fra produksjonsindustrien eller resirkulert skrap til noe ... -
An experimental study on pre-stretched double-chamber 6000-series aluminium profiles subjected to quasi-static and dynamic axial crushing
Qvale, Kristin; Hopperstad, Odd Sture; Reiso, Oddvin; Tundal, Ulf; Marioara, Calin Daniel; Børvik, Tore (Peer reviewed; Journal article, 2020)Automotive crash boxes require a material selection with strength and ductility in a balanced combination. In this work, the behaviour of double-chamber AA6063 and AA6082 aluminium profiles subjected to quasi-static and ... -
Mikrostruktur og mekaniske egenskaper for skrueekstrudert aluminium: Karakterisering av skrueekstrudert aluminium etter ulike rensmetoder av råmaterialet
Bilsbak, Audun (Master thesis, 2012)Det er aktuelt å bruke restaluminium fra produksjonsindustrien som råmaterialet til skrueekstrudering. Restaluminiumet inneholder forurensinger som blant annet skjæreolje. Dette arbeidet har fokusert på ulike rensemetoder ... -
Optimization of Electrical Conductivity in Screw Extruded Wires
Langelandsvik, Geir (Master thesis, 2017)The novel production method of screw extrusion was used to produce an electrical conducting wire of commercial pure aluminium. To optimize electrical properties, effects of impurity atoms in solid solution were examined ... -
Porosity Reduction and Characterization of Aluminium Components Produced by Additive Manufacturing
Djuraev, Alisher (Master thesis, 2017)Selective laser melting (SLM) is a relatively novel method used to produce metallic parts directly from computer models by selectively fusing metallic powder. The production is fundamentally different from traditional ... -
Recycling of Al from incinerator bottom ash with screw extruder
Breivik, Sigmund Langedal (Master thesis, 2021)Abstract will be available on 2024-07-01 -
Screw Extrusion from various Binary Al-XMg Feed Materials - Effects of Heat Treatment on Microstructure
Berulfsen, Tarjei (Master thesis, 2016)Three direct chill (DC) cast aluminium-magnesium (Al-Mg) alloys, with 5, 8, and 10 wt% magnesium, have been used as base materials. These base materials were either rapidly solidified by melt spinning, or granulated by ... -
Screw Extrusion of Light Metals: Development of materials, characterization and process analysis
Skorpen, Kristian Grøtta (Doctoral theses at NTNU;2018:218, Doctoral thesis, 2018)The presented work highlights the possibilities inherent in a new method for continuous extrusion, i.e. hereafter named metal continuous screw extrusion (MCSE). This was done by expanding the knowledge of the process itself, ... -
The Applicability of Aluminium Alloys as Reinforcement Material in Concrete Constructions
Amundsen, Hans Sigurd (Master thesis, 2018)This thesis is a part of the DARE2C research project. The research projects primary objective is to develop a more environmentally-friendly type of concrete where more than 55% of the cement is replaced with less CO2(g) ...