Browsing NTNU Open by Author "Langelandsvik, Geir"
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Aluminum weld metal inoculation by Ti/TiB2/TiC additions to screw extruded filler wires
Kirkbakk, Kjell Martin (Master thesis, 2022)Nylig utviklede metoder har gjort det mulig å produsere Al-TiC nanokompositt-sveisetråder som fører til økt kornforfining i sveisemetallet. Dette reduserer tilbøyeligheten til varmsprekking i de utherdbare aluminiumslegeringene, ... -
Characterisation of an aluminium matrix nanocomposite wire manufactured by screw extrusion
Ragnvaldsen, Olav (Master thesis, 2019)Kontinuerleg skrueekstrusjon av metaller (Metal Continuous Scew Extrusion, MCSE) er ein nyutvikla, fast tilstands produksjonsmetode, som tilrettelegg for framstilling av metallegeringar og komposittar med nye eigenskapar. ... -
Comparative study of eutectic Al-Si alloys manufactured by WAAM and casting
Langelandsvik, Geir; Horgar, Annbjørg; Furu, Trond; Roven, Hans Jørgen; Akselsen, Odd Magne (Peer reviewed; Journal article, 2020)Wire and arc additive manufacturing (WAAM) of metallic materials is expected to become part of the new industrial revolution. The possibilities for complex designs and superior mechanical properties can in many cases replace ... -
Comparative Study of Mechanical Properties and Microstructure of Components Made by Casting and Wire + Arc Additive Manufacturing of Eutectic Al-12Si Alloy
Horgar, Annbjørg (Master thesis, 2019)Masteroppgaven vurderer sammenhengen mellom additiv tilvirkning ved lysbuesveising med trådmater (eng. Wire and Arc Additive Manufacturing, fork. WAAM) og støping av aluminium legert med silisiuminnhold (Si) på 12% (Al-12Si). ... -
Comparative Study of Mechanical Properties and Microstructure of Components Made by Casting and Wire + Arc Additive Manufacturing of Eutectic Al-12Si Alloy
Horgar, Annbjørg (Master thesis, 2019)Masteroppgaven vurderer sammenhengen mellom additiv tilvirkning ved lysbuesveising med trådmater (eng. Wire and Arc Additive Manufacturing, fork. WAAM) og støping av aluminium legert med silisiuminnhold (Si) på 12% (Al-12Si). ... -
Depth profiling at a steel-aluminum interface using slow-flow direct current glow discharge mass spectrometry
Paudel, Gagan; Langelandsvik, Geir; Khromov, Sergey; Arbo, Siri Marthe; Westermann, Ida; Roven, Hans Jørgen; Di Sabatino Lundberg, Marisa (Journal article; Peer reviewed, 2021) -
Development of Al-TiC Wire Feedstock for Additive Manufacturing by Metal Screw Extrusion
Langelandsvik, Geir; Grandcolas, Mathieu; Skorpen, Kristian Grøtta; Furu, Trond; Akselsen, Odd Magne; Roven, Hans Jørgen (Peer reviewed; Journal article, 2020)The development of customised aluminium alloys for welding and additive manufacturing (AM) is proposed to solve several quality issues and to enhance the mechanical integrity of components. The introduction of ceramic grain ... -
Effect of preheating and preplaced filler wire on microstructure and toughness in laser-arc hybrid welding of thick steel
Bunaziv, Ivan; Langelandsvik, Geir; Ren, Xiaobo; Westermann, Ida; Rørvik, Gisle; Dørum, Cato; Danielsen, Morten Høgseth; Eriksson, Magnus Carl Fredrik (Peer reviewed; Journal article, 2022)Acicular ferrite (AF) is the most important microstructural constituent to achieve high toughness at low temperatures in weld metal of steels. This is due to the relatively small grain size and large misorientation angles. ... -
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 ... -
Grain refinement of aluminium welds by Ti, TiB2, and TiC filler wire inoculation
Kirkbakk, Kjell Martin; Marhaug, Nikolai; Langelandsvik, Geir; Werenskiold, Jens Christofer (Peer reviewed; Journal article, 2023)A fine-grained fusion zone characterises a tough aluminium weld. To improve the solidification characteristics and refine the grains in aluminium welding, different inoculation particle combinations were introduced to the ... -
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 ... -
Optimization of Electrical Conductivity in Screw Extruded Wires: The effect of aluminium oxide particles on screw extruded wires of pure aluminium
Edvardsen, Martine Hanshus (Master thesis, 2021)Elektrisk ledende tråder av en aluminium-matrise kompositt (aluminium matrix composite (AMC)) ble produsert gjennom kontinuerlig skrueekstrudering av metaller (Metal continuous screw extrusion (MCSE)). Kompositten bestod ... -
Review of Aluminum Alloy Development for Wire Arc Additive Manufacturing
Langelandsvik, Geir; Akselsen, Odd Magne; Furu, Trond; Roven, Hans Jørgen (Peer reviewed; Journal article, 2021)Processing of aluminum alloys by wire arc additive manufacturing (WAAM) gained significant attention from industry and academia in the last decade. With the possibility to create large and relatively complex parts at low ... -
Tilsats av mikrokeramiske partikler i aluminiumsstøping
Lærum, Sigbjørn (Master thesis, 2023)Denne oppgaven tar for seg støpeforsøk med en aluminium (Al) 1xxx legering. Det er tilsatt ulike mengder av de mikrokeramiske partiklene titankarbid (TiC) på 4 μm og zirkoniumdiborid (ZrB2) på 3 μm for å undersøke hvordan ... -
Understanding the inoculation of aluminium grains during welding under the influences of high cooling rate and high temperature gradient
Xu, Yijiang; Langelandsvik, Geir; Bunaziv, Ivan; Li, Yanjun (Peer reviewed; Journal article, 2023)Inoculation is an important method to generate fine equiaxed grain structures in alloys during solidification, which is widely used in shape casting and direct chill casting processes of aluminium alloys. Different from ... -
Wire and Arc Additive Manufacturing with TiC-Nanoparticle Reinforced AA5183 Alloy
Langelandsvik, Geir; Ragnvaldsen, Olav; Flåm, Jan Eskil; Akselsen, Odd Magne; Roven, Hans Jørgen (Peer reviewed; Journal article, 2020)Wire and arc additive manufacturing of aluminium-ceramic composites shows great potential to produce high strength materials. By incorporation of nanoparticles in the feedstock wire, fine-grained material with low ... -
Wire Arc Additive Manufacturing by Robot Manipulator: Towards Creating Complex Geometries
Evjemo, Linn Danielsen; Langelandsvik, Geir; Gravdahl, Jan Tommy (Journal article; Peer reviewed, 2019)Additive manufacturing (AM) is the umbrella term that covers a variety of techniques that build up structures layer-by-layer as opposed to machining and other subtracting methods. It keeps evolving as an important technology ... -
Wire arc additive manufacturing of AA5183 with TiC nanoparticles
Langelandsvik, Geir; Eriksson, Magnus; Akselsen, Odd M.; Roven, Hans Jørgen (Peer reviewed; Journal article, 2021)Aluminium alloys processed by wire arc additive manufacturing (WAAM) exhibit a relatively coarse microstructure with a columnar morphology. A powerful measure to refine the microstructure and to enhance mechanical properties ... -
Wire Arc Additive Manufacturing of Aluminium Alloys
Langelandsvik, Geir (Doctoral theses at NTNU;2021:263, Doctoral thesis, 2021)Summary Additive manufacturing of metals has gained considerable attention from the industry and academia in the last decade. The attributes to create stand-alone components with novel designs and enhanced properties ... -
Wire-arc additive manufacturing of structures with overhang: Experimental results depositing material onto fixed substrate
Evjemo, Linn Danielsen; Langelandsvik, Geir; Moe, Signe; Danielsen, Morten Høgseth; Gravdahl, Jan Tommy (Peer reviewed; Journal article, 2022)As additive manufacturing (AM) technology grows both more advanced and more available, the challenges and limitations are also made more evident. Most existing solutions for AM build structures layer by layer using strictly ...