Browsing NTNU Open by Author "Aune, Ragnhild"
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Additive manufacture of superduplex stainless steel using WAAM
Eriksson, Magnus Carl Fredrik; Lervåg, Malin; Sørensen, Camilla; Robertstad, Andreas; Brønstad, Bård M.; Nyhus, Bård; Aune, Ragnhild; Ren, Xiaobo; Akselsen, Odd Magne (Journal article; Peer reviewed, 2018)Superduplex stainless steels have been used in the oil and gas industry for a couple of decades due to the combination of excellent mechanical properties and corrosion resistance. The present investigation addresses the ... -
Additive manufacturing of thin-walled structures by robot manipulator : An experimental approach focusing on arc welding
Evjemo, Linn Danielsen (Doctoral theses at NTNU;2022:208, Doctoral thesis, 2022)Additive manufacturing (AM) has, over recent decades, become a quickly evolving and ever more present part of production and manufacturing. It has gone from being a simple prototyping method to building more complex ... -
Additive Manufacturing with Superduplex Stainless Steel Wire by CMT Process
Lervåg, Malin; Sørensen, Camilla; Robertstad, Andreas; Brønstad, Bård M.; Nyhus, Bård; Eriksson, Magnus Carl Fredrik; Aune, Ragnhild; Ren, Xiaobo; Akselsen, Odd Magne; Bunaziv, Ivan (Journal article; Peer reviewed, 2020)For many years, the oil and gas industry has utilized superduplex stainless steels due to their high strength and excellent corrosion resistance. Wire arc additive manufacturing (WAAM) was used with superduplex filler wire ... -
Aluminizing of plain carbon steel: Effect of temperature on coating and alloy phase morphology at constant holding time
Isiko, Maureen Bangukira (Master thesis, 2012)Aluminized steel possesses excellent physical, chemical and mechanical properties as compared to plain carbon steel. This type of steel has found application in high temperature, oxidizing and corrosive environments. In ... -
Characterization and recovery of rare earth elements from electronic scrap
Bristøl, Lene Marie Lysgaard (Master thesis, 2012)The rare earth elements are a group of 17 elements consisting of the lantahnide series, scandium and yttrium. The application with the largest rare earth consumption is the permanent rare earth magnets. The neodymium-iron-boron ... -
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 ... -
Effekt av Fe og Mn tilsetninger på Al-legeringssmelte og deres effekt på formasjon av intermetalliske faser
Grorud, Sebastian; Sponland, Kjetil-André (Bachelor thesis, 2019)Dannelsen av jernholdige intermetalliske faser i 3103 og 6082 legeringer er forventet å bli et økende problem etter- som Fe nivåer øker i resikulert alumnium. Legeringer ble støpt med nominell wt%, 150 wt% og 200 wt% Fe ... -
Experimental Study of the Thermal Stability and Chemical Reactivity of AlPO4-Bonded Ceramic Foam Filters (CFFs) in Contact with Molten Aluminium
Solem, Cathrine Kyung Won (Master thesis, 2018)Filtration of liquid aluminium is widely used in the industry for the removal of inclusions, and Ceramic Foam Filters (CFFs) are often the filtration media of choice. Following an incident with generation of PH3 (g) ... -
Filtration of Aluminium Melts using Ceramic Foam Filters (CFF) and Electromagnetic Field
Fritzsch, Robert (Master thesis, 2011)AbstractThe objective of the experimental trials was to investigate the influence of the electromagnetic force generated by an AC powered solenoid on ceramic foam filters (CFF) of different filter grades (30, 50 and 80 ... -
Grain refinement of commercial EC Grade 1070 Aluminum alloy for electrical application
Hassanabadi, Massoud (Master thesis, 2014)The aluminium alloys for electrical conductivity applications are not grain refined since the addition of grain refiners might decrease their electrical conductivity by inserting impurities into the melt. Still, non-grain ... -
In-vitro Study of the Material Properties of PUR Subcutaneous Venous Access Ports Exposed to Chemotherapy Drugs and Whole Blood
Fossum, Maren Kirknes (Master thesis, 2015)Central Venous Catheters (CVCs) are used to provide safe administration of chemotherapeutic drugs during cancer treatment. This study focused on how the treatment influences the material properties of one type of CVC, the ... -
Intermetallic Phase Layers in Cold Metal Transfer Aluminium-Steel Welds with an Al–Si–Mn Filler Alloy
Bergh, Tina; Ånes, Håkon Wiik; Aune, Ragnhild; Wenner, Sigurd; Holmestad, Randi; Ren, Xiaobo; Vullum, Per Erik (Peer reviewed; Journal article, 2023) -
Investigation of Inclusion Characteristics in LCAK Calcium Treated Steel: Inclusion characterization in 3-D using Electrolytic Extraction and SEM
Sharma, Rajat (Master thesis, 2011)Low carbon steel samples taken during various stages of secondary refining were used in the present work for Electrolytic extraction (EE) to dissolve some metal and filter the solution to collect the inclusions.These film ... -
Life Cycle Assessment of Body-in-White Produced from Recycled Aluminum
Bjørnbet, Marit Moe (Master thesis, 2014)The secondary production of aluminum has a large potential in terms of energy savings compared to primary production. Due to the increasing use of aluminum in products, there is a larger demand for aluminum than can be ... -
Liquid Permeability of Ceramic Foam Filters
Zhang, Kexu (Master thesis, 2012)This project is in support of the PhD project: Removal of Inclusions from Liquid Aluminium using Electromagnetically Modified Filtration . The purpose of this project was to measure the tortuosity, and permeability of ... -
Master Slag Production for the Recovery of Rare Earth Elements
Rodahl, Fredrik André Elgvin (Master thesis, 2017)The Rare Earth Elements (REEs) is a term describing a group of 17 elements which are critical components in many technological applications due to their magnetic or optical properties. In contrast to the name, these elements ... -
Oxide Hydrogen Interaction and Porosity Development in Al-Si Foundry Alloys
Mirzaei, Behzad (Master thesis, 2011)The oxide level of an A356 aluminium alloy will be controlled by (i) melting, casting and remelting A356 aluminium alloy for increasing the bi-films levels in the melt, and by (ii) additions of an extruded aluminium oxide ... -
Production and Characterization of a Zr-based Bulk Metallic Glass: The possibility of a future biomaterial
Hansen, Marius (Master thesis, 2013)Materials put under strain while exposed to the harsh environment of the human body, must not only be chemically stable, but also have good tribocorrosion properties, i.e. a combination of good corrosion and wear properties.In ... -
Production and Characterization of Advanced Bulk Metallic Glasses for Hip Implant Applications.
Tabeshian, Ali (Master thesis, 2011)AbstractThe aim of the present project was to investigate the possibilities of using a Zr55Cu30Ni5Al10 Bulk Metallic Glass (BMG) alloy as articulating surface in an artificial hip joint.In order for a material to be used ... -
Slag and refractory compatibility in the CONSTEEL EAF
Ahmad, Esmail (Master thesis, 2016)This project is in collaboration with Celsa Armeringsstål AS facilities in Mo i Rana, consisting of a steel mill, with a continuous charging EAF (CONSTEEL Electric Arc Furnace), and a combined rolling mill for reinforcing ...