Blar i NTNU Open på forfatter "Lunder, Otto"
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Intergranulær korrosjon som følge av mekanisk og termisk prosessering av ekstruderte AlMgSi(Cu)-legeringer (KK13)
Blomlie, Espen Andreas (Master thesis, 2016)Hovedformålet med denne rapporten er å bestemme hvilke faktorer som påvirker graden av intergranulær korrosjon i områder som er deformert på forskjellig måte og har ulik geometri. Dette er undersøkt med bakgrunn og grunnlag ... -
Korrosjonsoppførsel av AA5083- og AA6082-legeringer ved ulike temperaturer.
Sakshaug, Bjørn-Eirik (Master thesis, 2015)Olje- og gassindustrien søker stadig nye områder i jakten på uoppdagede reservoarer, og det blir derfor stadig viktigere å forstå hvordan nye miljø og endringer i klima påvirker aktuelle aluminiumslegeringers egenskaper. ... -
Mechanical Properties and Corrosion Behaviour of Extruded and Welded AA6082
Rostad, Kjetil Steen (Master thesis, 2014)Welding and corrosion will play a key role in the further increased use of aluminium alloys in industrial applications. This is especially true as the oil and gas industry is moving into the arctic region in search for new ... -
Mechanistic investigation of the pretreatment of AA6060 with varying Ni and Cu content
Storli, Kathrine Sletteberg (Master thesis, 2022)Aluminium er et allsidig materiale på grunn av metallets høye styrke-til-vekt-forhold, duktilitet og gode korrosjonsbestandighet. Økt bruk av resirkulert aluminium krever at det resirkulerte produktet oppnår de samme ... -
Progress in Understanding Initiation of Intergranular Corrosion on AA6005 Aluminum Alloy with Low Copper Content
Kumari, Shilpa; Wenner, Sigurd; Walmsley, John; Lunder, Otto; Nisancioglu, Kemal (Journal article; Peer reviewed, 2019)As part of an extensive research program to study recent, unexpected intergranular corrosion (IGC) on 6xxx series aluminum alloys (AlMgSi), this paper investigates the mechanism of initiation and early propagation of IGC ... -
Recycled Aluminium Alloys and their Models: Role and Behaviour of Alloying Elements during Alkaline Etching
Mysliu, Erlind; Sletteberg Storli, Kathrine; Kjørsvik, Eline; Lunder, Otto; Erbe, Andreas (Peer reviewed; Journal article, 2023)Alkaline etching is a common pretreatment for aluminum surfaces. Etching behavior was compared between an alloy based on post-consumer scrap (PCS) and several model alloys of rolled AA3005 and extruded AA6060 with ... -
Role of aluminium hydrides in localised corrosion of aluminium revealed by operando Raman spectroscopy
Mysliu, Erlind; Lunder, Otto; Erbe, Andreas (Peer reviewed; Journal article, 2023)Filiform corrosion (FFC) is characteristic of metals such as aluminium and magnesium, usually takes place on coated metals, and spreads from coating defects in the form of filaments with a width on the order of 100 μm. In ... -
Stress Corrosion Cracking in an Extruded Cu-Free Al-Zn-Mg Alloy
Lervik, Adrian; Walmsley, John Charles; Lodgaard, Lars; Marioara, Calin Daniel; Johnsen, Roy; Lunder, Otto; Holmestad, Randi (Peer reviewed; Journal article, 2020)Stress corrosion cracking (SCC) in Cu-free Al-Zn-Mg (7xxx) aluminium alloys limits its use in many applications. In this work, we study in detail the microstructure of a peak and slightly overaged condition in an AA7003 ... -
The correlation between intergranular corrosion resistance and copper content in the precipitate microstructure in an AA6005A alloy
Marioara, Calin Daniel; Lervik, Adrian; Grønvold, Julie; Lunder, Otto; Wenner, Sigurd; Furu, Trond; Holmestad, Randi (Journal article; Peer reviewed, 2018)A positive correlation is observed between the amount of Cu incorporated in hardening precipitates and intergranular corrosion resistance in an artificially aged Cu-containing 6005A alloy. Three mechanisms have been ... -
The Effect of Cooling Rate and Pre-Deformation on Corrosion Behaviour of Extruded AlMgSi(Cu, Zn)-Alloys
Koren, Erik Aas (Master thesis, 2020)Aluminiumslegeringer i 6xxx-serien med høyt styrke-til-vekt-forhold kan, på grunn av vektreduksjon, bidra til å redusere utslipp av drivhusgasser i transportindustrien. Resirkulering av disse legeringene kan ytterligere ... -
The Effect of Deformation on Intergranular Corrosion of AlMgSi Alloys
Grønvold, Julie (Master thesis, 2017)The heat treatable AlMgSi alloys are regarded as medium strength materials with excellent corrosion properties. To achieve enhanced mechanical properties with the aim to expand the application areas, Cu may be added since ... -
The Effect of Magnetic Field and Sulphide-Pollution on Corrosion Behaviour of Nickel-Aluminium Bronze in Seawater
Mørkve, Marte Sørtveit (Master thesis, 2015)The objective with this work was to investigate the corrosion behaviour of nickel-aluminium bronze in both pure and sulphide-polluted seawater, and possible synergy effects with an applied magnetic field (MF). Two different ... -
The Effect of Mn and Homogenisation Procedure on Mechanical Properties and Grain Structure in Extruded AA6082
Bru, Magnus (Master thesis, 2014)Extruded profiles of AlMgSi-alloys are widely used in various industries such as the automotive industry, aerospace and in the oil and gas industry. To tailor the alloys for specific needs and applications, more information ... -
Zinc-rich coatings for improved corrosion resistance of extruded aluminium heat-exchange tubing in acidified chloride solution
Stepanova, Mariia (Doctoral theses at NTNU;2017:294, Doctoral thesis, 2017)Thin walled heat exchanger Al alloy tubes, with solid-solution Zn-rich surface, are widely used by the automotive industry and are considered by the heat, ventilation, air-conditioning and refrigeration market. This work ...