Browsing Institutt for materialteknologi by Issue Date
Now showing items 121-140 of 2534
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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 ... -
Thermal Forge Welding Simulations: A Weldability Study of X65 Pipeline Quality
(Master thesis, 2011)Shield active gas forge welding is a time-efficient welding technique for solid statewelding of pipelines. Pipes are first heated by induction or ohmic resistance, and areforged together using an active shielding gas to ... -
Characterisation of Iridium Oxides for Acidic Water Electrolysis
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:190, Doctoral thesis, 2011) -
Thermally Sprayed Aluminum (TSA) with Cathodic Protection as Corrosion Protection for Steel in Natural Seawater: Characterization of Properties on TSA and Calcareous Deposit
(Master thesis, 2011)Cathodic protection is an effective corrosion protection for structures submerged in seawater. In addition to applying the current need to lower the metal below the protection potential, a resulting increase in interfacial ... -
Investigation of metallic bipolar plates for PEM fuel cells
(Master thesis, 2011)High cost and a short lifetime are the two main reasons why the PEM fuel cell is yet to be commercialized. The bipolar plate in a PEM fuel cell is alone responsible for about 45% of the cost and 85% of the total weight of ... -
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 ... -
Numerisk modellering av tilbakeglødingsoppførsel i utvalgte aluminiumslegeringer
(Master thesis, 2011)I denne rapporten er det tatt for seg modellering av mykningsreaksjoner etter deformasjon for AA1200- og AA3103-legeringer. Grunnleggende teori rundt mykningsreaksjonene for disse legeringene er presentert. Det er hentet ... -
Filtration of Aluminium-Experiments, Wetting,and Modelling
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:, Doctoral thesis, 2011)The present work deals with the inclusion removal mechanism in aluminium filtration and the use of alternative filter materials. Four routes are investigated. First, an overview of previous research on filtration knowledge ... -
Formation of Silicon Carbide in the Silicomanganese Process
(Master thesis, 2011)As the silicon content in a silicomanganese alloy increase, silicon carbide becomes the stable carbon phase. Little work is published on the formation of silicon carbide in the SiMn process. This thesis examines the formation ... -
Anodic Activation of Aluminum by Trace Element Tin
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:241, Doctoral thesis, 2011)Anodic activation of commercial and model aluminum alloys in chloride solution became of practical importance in connection with filiform corrosion of painted aluminum sheet in architectural application and aluminum ... -
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 ... -
Solid state recycling of aluminium scrap and dross characterization
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:325, Doctoral thesis, 2011)The global demand for aluminium and aluminium products is progressively increasing. However, the production of primary aluminium is an energy intensive process and emits at the world average ~12 tonnes of carbon dioxide ... -
Reduction of Pelletized Tyssedal Ilmenite and the Effect of Changing Gas Composition and Flow, Pellet Size and Pre Oxidation Condition
(Master thesis, 2011)This master thesis is based on reduction experiments of pelletized Tyssedal ilmenite. The focus is set on the effect of changing parameters such as gas composition, gas flow, pellet size and pre-oxidation condition. The ... -
The Effect of Pre-deformation on Precipitation and Mechanical Properties during Aging of Al-Mg-Si Alloys: An Experimental Study
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:84, Doctoral thesis, 2011)The present work reports on the effect of small deformations on the natural and artificial aging behaviour of two industrial aluminium alloys. The main focus has been on the mechanical properties response of these alloys, ... -
Electrodeposition of Silicon in Fluoride Melts: Production of Silicon Films
(Master thesis, 2011)There has been considerable interest in electrodeposition of silicon from fluoride melts on a suitable substrate for its application in thin film solar cells. The goal of this work is to produce a high purity silicon films ... -
Stability and compatibility of fuel cells based on proton conducting materials
(Master thesis, 2011)Stability and compatibility of the proton conducting electrolyte material La6WO12 with the potential cathode materials LaCoO3 and La2NiO4 were investigated by means of solid-solid diffusion couples. Reactivity studies were ... -
Multi-scale strain measurements vs. grain size in aluminium
(Master thesis, 2011)Now days, aluminum usage is increasing in industry. This metal has good formability and mechanical properties, but combination of mechanical strength and elongation could be improved in order to enhance competition.One of ... -
Hydrothermal Synthesis of LaFeO3
(Master thesis, 2011)This work explores the hydrothermal synthesis of LaFeO3 (LFO) nanorods with a high aspect ratio. Synthesis of rod shaped LFO is a stepping stone to the synthesis of strontium doped LFO (LSF) nanorods with high aspect ratio. ... -
Removal of Phosphorus from Silicon Melts by Vacuum Refining
(Master thesis, 2011)Induction vacuum refining testwork has been carried out for the removal of phosphorus from silicon melts. This work is of interest for the production of solar-grade silicon, since phosphorus is hard to remove from silicon ... -
Mesoscale Modeling of Dendritic Growth During Directional Solidification of Aluminium Alloys
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:13, Doctoral thesis, 2011)The development of materials based on metallic alloys with specific properties requires controlled solidification processes. Indeed, materials properties depend strongly on the microstructure. In the past few decades ...