Browsing Institutt for materialteknologi by Subject "Materialteknologi, Materialutvikling og -bruk"
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A TEM Study of Weakly Overaged Precipitates in AA 6082
(Master thesis, 2016)New models for modeling the material properties for aluminium alloys that can take into consideration the geometry of the needle shaped precipitates, that can be found in 6xxx alloys are being developed. The background for ... -
Alternating Current Corrosion of Steel in Seawater
(Master thesis, 2015)A challenge regarding the transportation of oil and gas in pipelines subsea is to keep the temperature high enough to avoid formation of wax and hydrates, which eventually will stop the flow. In 2000, Nexans introduced a ... -
Briquetting of Manganese Oxide Fines with Organic Binders - How well suited are organic binders for agglomeration of Mn-oxide fines?
(Master thesis, 2017)Dust and fines are created throughout the ferromanganese metal production. These fines are collected from ventilation filters, screening operations and off-gas cleaning facilities. As the fines contain a substantial amount ... -
Characterisation of Feed and Produced Material in Screw Extrusion of Titanium
(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 of Aluminium Components Produced by Additive Manufacturing
(Master thesis, 2016)Additive manufacturing (AM) is a new method of manufacturing that can produce physical objects directly from CAD-models. Powder Bed Fusion (PBF) technology can produce metallic parts by selectively fusing powders layer by ... -
Characterization of Coextruded Rods with Al-4,5Mg as the Base Alloy and Rapidly Solidified Al-4,5Mg-1Ag as the Surface Alloy
(Master thesis, 2017)Coextruded rods with Al-4,5wt%Mg as the base alloy and rapidly solidified Al-4,5wt%Mg-1wt%Ag as the surface alloy has been characterized. Precipitation hardening, light microscopyand scanning electron microscopy (SEM) ... -
Corrosion Fatigue of Extruded AA6082 Aluminium Alloy - The effects of Surface Roughness: Machined, Punched, and Counter Trimmed Surfaces
(Master thesis, 2017)The aim of this master s thesis is to investigate the corrosion fatigue properties of an extruded AA6082 alloy. Surface roughness deeply affects fatigue and corrosion fatigue. Surface roughness depends on the shaping ... -
Deposition of phase pure KNN thin Films
(Master thesis, 2016)Piezoelectric and ferroelectric materials have a wide range of applications, from touch and heat sensors to LCDs and actuators in MEMS. Lead zirconate titanate (PZT), is the most well-known ferroelectric material, and is ... -
Development of Composite Cathodes for Solid Oxide Fuel Cells
(Master thesis, 2017)Solid oxide fuel cells have the potential to become an important device for clean energy production. Today, these cells run at high temperatures, which causes degradation in the cell components and a short life-time of the ... -
Development of Hydrophobic Surfaces for Anti-Icing Applications - Steel Substrates
(Master thesis, 2015)Icing is a major problem for ships, airplanes, and wind turbines, among many other applications. To reduce or remove icing is extremely costly and is constantly in need of manpower. In this thesis the possibility of a ... -
Effect of Different Polymorphs of SiO2 on the Reaction between SiO2 and SiC in Si Production
(Master thesis, 2017)The aim of this work have been to investigate the phase transformations in silica (SiO2) during heating to target temperature, and the effect of SiO2 polymorphs on the reduction reaction between SiO2 and silicon carbide ... -
Effect of Mn and Dispersoids on Grain Structure, Mechanical Properties and Crush Behavior of Extruded AA6082 Alloys
(Master thesis, 2015)In this study five different variants of an AA6082 aluminum alloy were investigated. The alloys have various amounts of Mn (0.006-1.172 wt%) and are homogenized in two different ways. After homogenization the billets got ... -
Fatigue of Extruded AA6082 and AA7108 Alloys - The Effects of Natural Ageing Compared to Artificial Ageing
(Master thesis, 2015)Heat treatable aluminium alloys might have the potential to gain unexpected increase in mechanical properties when stored at room temperature (natural ageing) after extrusion, for long periods of time. The main aim of the ... -
In Situ Tensile Testing During Continuous EBSD Mapping of Super Duplex Stainless Steel Containing Sigma Phase
(Master thesis, 2016)Super duplex stainless steels (SDSS) are materials which comprise an extraordinary combination of mechanical properties, corrosion resistance and relatively low cost. SDSS were developed on the basis for use in the North ... -
Intergranulær korrosjon som følge av mekanisk og termisk prosessering av ekstruderte AlMgSi(Cu)-legeringer (KK13)
(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 ... -
Kinetics and Mechanism of Phase Transformations from Quartz to Cristobalite
(Master thesis, 2016)The largely debated silica polymorphism has in this thesis been investigated for the transformation from β-quartz to β-cristobalite. It is done as a step in understanding and improve the furnace operations of the silicon ... -
Kvantifisering av rest-austenitt i sveisesimulert SMSS og kontinuerlig EBSD karakterisering under in-situ strekktesting
(Master thesis, 2016)Denne oppgavene omhandler EBSD kvantifisering av rest-austenitt i sveisesimulert SMSS og utforsker i tillegg en ny metode for in-situ strekktesting hvor EBSD opptak blir gjort under kontinuerlig strekking. To ulike strategier ... -
Microstructure and Mechanical Properties of Welded AA6082 Aluminium Alloys
(Master thesis, 2016)The present work have investigated variants of an AA6082 aluminium alloy. Five different alloys with various amounts of Mn, Cr and Zr have been subjected to three homogenization procedures. After homogenization, the aluminium ... -
Optimization of Electrical Conductivity in Screw Extruded Wires
(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
(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 ...