Blar i Institutt for materialteknologi på emneord "Materialutvikling og -bruk"
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AC corrosion on cathodically protected steel
(Master thesis, 2012)This report deals with the effect of alternating current on cathodically protected steel. AC corrosion has become relevant in the offshore industry due to the introduction of the direct electric heating system (DEH). The ... -
AC Induced Corrosion of Carbon Steel in 3.5wt% NaCl Electrolyte
(Master thesis, 2012)This paper deals with alternating current (AC) corrosion of low alloy carbon steel in 3.5 wt% NaCl electrolyte. Accelerated corrosion rates have been reported when exposed to AC and the corrosion mechanism is not well ... -
Alternating Current Corrosion of Carbon Steel
(Master thesis, 2011)The objective was to investigate if the established theory concerning corrosion calculations and electrochemical behavior of carbon is valid when steel is exposed to AC in an electrolyte consisting of 3,5 wt% NaCl and ... -
ARB-valsede laminatkompositter av AA3103 og Cu
(Master thesis, 2012)Laminatkompositter av plater av AA3103 aluminium + copper, samt AA3103 + C24000 messing, har blitt laget ved å anvende en prosess for akkumulert valsesveising (ARB). To forskjellige kobber/aluminium-stabler ble utsatt for ... -
Case Hardening of Hardox 450 Steel for Increased Ballistic Strength
(Master thesis, 2011)AbstractSteel alloys are the material that is most used in protective constructions today. The reason is the overall good properties of steels, with its high strength and hardness, high ductility, high formability and ... -
Ceramic Thermal Barrier Coatings of Yttria Stabilized Zirconia Made by Spray Pyrolysis
(Master thesis, 2011)A thermal barrier coating (TBC) is used as thermal protection of metallic components exposed to hot gas streams in e.g. gas turbine engines. Due to a high thermal expansion coefficient, low thermal conductivity, chemical- ... -
Characterization of precipitates at maximum hardness and overaged conditions in Al-Mg-Si alloys
(Master thesis, 2011)A study of the influence of artificial ageing temperature on the precipitation behaviour in three distinct direct chill casted and extruded Al-Mg-Si alloys has been carried out. The total amount of alloying elements is ... -
EBSD-karakterisering av et HSLA-stål under in situ varmebehandling
(Master thesis, 2011)Ved sveising av HSLA-stål (High Strength Low Alloy) designet for lavtemperatur applikasjoner kan det dannes lokale sprø soner som martensitt/austenitt-faser (MA-faser). Det er derfor ønskelig å karakterisere austenitten ... -
Effect of Copper Content on etching Response of Aluminum in Alkaline and Acid Solutions
(Master thesis, 2012)Copper are used as an alloying element in aluminum alloys to increase the strength of the material. By mixing copper and aluminum the good corrosion resistance of the pure aluminum decreases giving the alloy a lower corrosion ... -
Effect of Fe and Si content in Aluminium Alloys as a result of increased recycling: Testing of high purity Aluminium Alloys in uniaxial tension
(Master thesis, 2011)The recycling of aluminium from used aluminium scrap leads to an unavoidable presence of pollutions in the form of elements of various amounts. Two such elements are iron and silicon. These will always be present to some ... -
Effect of Sulfide Inclusions in Austenitic Stainless Steel on the Initiation of Pitting in Base Metal and Heat Affected Zone after Welding
(Master thesis, 2012)The predominant site for the initiation of pitting on austenitic stainless steel has been shown to be sulfide inclusions and notably the manganese types of sulfides. Dissolution of inclusions has been observed and suggested ... -
Effekt av høyt silisiuminnhold i stål
(Master thesis, 2012)Det har i dette arbeidet blitt undersøkt hvilke effekter relativt store mengder silisium har på egenskaper i stål. To ulike deler i stål, tinder og fjærer, som jordbruksselskapet Kverneland Group ASA produserer, har blitt ... -
Experimental Studies of Cold Roll Bonded Aluminum Alloys
(Master thesis, 2011)This master s thesis is based on experimental studies of the parameters influencing cold roll bonding (CRB) of the aluminum alloys AA1200 and AA3103,in the work hardened and annealed condition. The effect on the bond ... -
Formation of Silicon Carbide and Graphite in the Silicomanganese Process
(Master thesis, 2012)When a liquid SiMn alloy is cooled, carbon is dissolved from the melt. The dissolved carbon either forms graphite or reacts with silicon from the melt to form SiC. The goal of this thesis has been to determine how temperature ... -
Grain Refinement of High Alloyed Steel With Cerium Addition
(Master thesis, 2011)This master thesis has the objective to improve the mechanical properties of Super Duplex steel by adding Elkem Grain Refiner (EGR). EGR is commercial grain refiner where the active element is cerium. Cerium is a strong ... -
High Temperature Cathodic Disbondin of Organic Coatings on Submerged Steel Structures
(Master thesis, 2011)There are currently no standard test methods for testing the cathodic disbonding properties of organic coatings at temperatures above 100 C. There are several subsea oil and gas reservoirs with high temperatures, some as ... -
In situ strekkforsøk med EBSD karakterisering av HSLA-stål ved romtemperatur og -60 °C
(Master thesis, 2011)Denne oppgaven har tatt for seg et 420 MPa HSLA stål. Stålet ble sveisesimulertfor å oppnå mikrostruktur tilsvarende grovkornet og interkritisk grovkornetHAZ. Interkritisk grovkornet HAZ ble oppnådd ved en tosyklus ... -
In-Situ Tensile Testing Combined with EBSD Analysis of Ti-6Al-4V Samples from Components Fabricated by Additive Layer Manufacture
(Master thesis, 2012)ALM-based production of Titanium components shows great promise in supplying cost-effective products within industries such as energy, chemical processing and aerospace. In common for all is high quality demands. This ... -
Intragranular Chromium Nitride Precipitates in Duplex and Superduplex Stainless Steel
(Master thesis, 2012)Intragranular chromium nitrides is a phenomenon with detrimental effects on material properties in superduplex stainless steels which have not received much attention. Precipitation of nitrides occurs when the ferritic ... -
Kimdanning av sprøbrudd i et 420 MPa arktisk stål
(Master thesis, 2011)Sveising fører til endret mikrostruktur i deler av stålet. I kombinasjon med lave temperaturer oppstår nye forutsetninger for brudd.I denne masteroppgava ble det sett på initiering av sprøbrudd i et sveisesimulert 420 ...