• Solubility of Nickel in Mg-Al, Mg-Al-Fe, and Mg-Al-Mn Systems 

      Tathgar, Harsharn S. (Doctoral thesis, 2001)
      The corrosion properties of magnesium alloys strongly depend on the alloy composition and impurities. Heavy elements like nickel, and iron have low solubility in solid magnesium. The dissolved elements in molten magnesium ...
    • Meniscus Dynamics in Aluminium Extrusion Ingot Casting 

      Iversen, Fionn (Dr. ingeniøravhandling, 0809-103X; 2002:57, Doctoral thesis, 2002)
      In the modern process of continuous Direct Chill (DC) hot top casting of aluminium extrusion ingot with gas slip, poor surface quality of the cast ingot can still be a problem. In the worst cases pronounced surface wrinkling ...
    • A Study of Localized Corrosion in Supermartensitic Stainless Steel Weldments 

      Enerhaug, Jakob (Dr.ingeniøravhandling, 0809-103X; 2002:72, Doctoral thesis, 2002)
      This doctoral thesis is concerned with pitting corrosion in super martensitic stainless steel (SMSS) weldments in slightly sour service. Thee main objective with the present thesis has been to find out why pitting corrosion ...
    • Sodium expansion and creep of cathode carbon 

      Hop, Jørund Gimmestad (Dr. ingeniøravhandling, 0809-103X; 2003:44, Doctoral thesis, 2003)
      An apparatus to measure compressive creep in carbon materials has been developed. Using the final experimental set-up five material properties could be measured in each electrolysis experiment. Creep, sodium expansion, ...
    • Electrochemical properties of phosphorus compounds in fluoride melts 

      Thisted, Elke William (Doktoravhandlinger ved NTNU, 1503-8181; 2003:52, Doctoral thesis, 2003)
      In the present work the behaviour of phosphorus species in fluoride-based melts was investigated. The motivation for the study was based on the deleterious effect of phosphorus on the aluminium production process. It is ...
    • Electrochemical Characterization of Melt Spun AB5 Type Alloys for Metal Hydride Batteries 

      Brateng, Randi (Dr. ingeniøravhandling, 0809-103X; 2003:45, Doctoral thesis, 2003)
      This thesis is part of a larger research project where two metal hydride forming AB5 type alloys have been investigated. A slightly non-stoichiometric alloy with mischmetal on A-site and nickel, cobalt, manganese and ...
    • Thermal Decoating of Aluminium Scrap 

      Kvithyld, Anne (Dr. ingeniøravhandling, 0809-103X; 2003:6, Doctoral thesis, 2003)
      A major problem in the recycling of aluminium is the presence of contaminants in the purchased scrap. Future plants may handle part of this challenge by installing a delacquering/decoating unit. This thesis attempts to lay ...
    • Chromate-free Pre-treatment of Aluminium for Adhesive Bonding 

      Lunder, Otto Reidar (Dr. ingeniøravhandling; 2003:59, Doctoral thesis, 2003)
      The increasing use of aluminium in automotive and transport applications is primarily driven by its high strength to weight ratio, enabling substantially improved fuel economy and reduced CO2 emissions when substituted for ...
    • Physual Designing - A Supportive Framework for Dispersed Engineering Design 

      Kristensen, Kjetil Bjørn (Dr. ingeniøravhandling, 0809-103X; 2003:56, Doctoral thesis, 2003)
      Corporations involved in engineering design face multiple challenges; collaboration in complex, geographically dispersed value chains, increasing pressure to reduce lead times to improve their competitive positions, and ...
    • Deformation and Softening behaviour of commercial AlMn-alloys: Experiments and Modelling 

      Sjølstad, Knut (Dr. ingeniøravhandling, 0809-103X; 2003:82, Doctoral thesis, 2003)
      A comprehensive study of the softening behaviour of two different non-heat treatable AlMn-alloys has been carried out. These alloys were a laboratory processed and an industrially processed AA3103-alloy. The primary objective ...
    • Protective films on molten magnesium 

      Aarstad, Kari (Doktoravhandlinger ved NTNU, 1503-8181; 2004:7, Doctoral thesis, 2004)
      Molten magnesium will oxidize uncontrollably in an atmosphere of air. To inhibit this, a protective gas is used to cover the melt. The gas most commonly used today is SF6. Fluorine is known to be the active component of ...
    • High Pressure Die Casting of Aluminium and Magnesium Alloys: Grain Structure and Segregation Characteristics 

      Laukli, Hans Ivar (Doktoravhandlinger ved NTNU, 1503-8181; 2004:57, Doctoral thesis, 2004)
      Cold chamber high pressure die casting, (HPDC), is an important commercial process for the production of complex near net shape aluminium and magnesium alloy castings. The work presented in the thesis was aimed at investigating ...
    • The Effect of Strain Path Changes on the Subsequent Recrystallisation Properties of Aluminium Alloys 

      Valle, Randulf (Doktoravhandlinger ved NTNU, 1503-8181; 2004:10, Doctoral thesis, 2004)
      A study of strain path related effects on recrystallisation in aluminium has been carried out. The recrystallisation process has been studied after deformation in torsion and one pass hot rolling. For both deformation ...
    • Ammonia as Hydrogen Carrier. Effects of Ammonia on Polymer Electrolyte Membrane Fuel Cells 

      Halseid, Rune (Doktoravhandlinger ved NTNU, 1503-8181; 2004:25, Doctoral thesis, 2004)
    • Silicon for Solar Cells 

      Søiland, Anne Karin (Doktoravhandlinger ved NTNU, 1503-8181; 2004:140, Doctoral thesis, 2005)
      This thesis work consists of two parts, each with a different motivation. Part II is the main part and was partly conducted in industry, at ScanWafer ASA’s plant no.2 in Glomfjord. The large growth in the Photo Voltaic ...
    • Intergranular corrosion of AA6000-series aluminium alloys 

      Svenningsen, Gaute (Doktoravhandlinger ved NTNU, 1503-8181; 2005:47, Doctoral thesis, 2005)
      Even though highly corrosion resistant in general, AlMgSi (6000-series) alloys may sometimes develop susceptibility to intergranular corrosion (IGC). In this work the effect of Cu content and various thermomechanical ...
    • Effect of trace element lead on the electrochemistry and corrosion of aluminium alloys 

      Sævik, Øystein (Doctoral thesis, 2005)
      Electrochemical activation of aluminium in chloride solution as a result of heat treatment at temperatures above 350°C is attributed to enrichment of trace element lead at the oxide-metal interface. Activation is manifested ...
    • Determination of Oxygen Transport Coefficients in Perovskites and Perovskite related Materials with mixed Conductivity 

      Watterud, Geir (Doktoravhandlinger ved NTNU, 1503-8181; 2005:191, Doctoral thesis, 2005)
      Perovskites and perovskite related materials are materials that are candidates for applications such as oxygen permeable membranes, cathodes for SOFC and high-temperature oxygen sensors. This arises from the potential high ...
    • Fluidity of Aluminium Foundry Alloys 

      Di Sabatino, Marisa (Doktoravhandlinger ved NTNU, 1503-8181; 2005:185, Doctoral thesis, 2005)
      The fluidity of an alloy plays a key role for the foundry and transport industries as it affects the quality and soundness of the cast products. Particularly, fluidity influences the reject rates, hence casting costs and ...
    • Operational Experience and Control Strategies for a Stand-Alone Power System based on Renewable Energy and Hydrogen 

      Miland, Harald (Doktoravhandlinger ved NTNU, 1503-8181; 2005:28, Doctoral thesis, 2005)
      The topic of this thesis is investigation of a small-scale stand-alone power system, based on both experimental work and computer simulations. The power system in this study uses solar energy as energy input, lead-acid ...