Browsing Institutt for materialteknologi by Title
Now showing items 2497-2509 of 2509
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Wire Arc Additive Manufacturing of Aluminium Alloys
(Doctoral theses at NTNU;2021:263, Doctoral thesis, 2021)Summary Additive manufacturing of metals has gained considerable attention from the industry and academia in the last decade. The attributes to create stand-alone components with novel designs and enhanced properties ... -
Wire Arc Additive Manufacturing of an Al-Mg Aluminium Matrix Nanocompsite
(Master thesis, 2020)Målet med denne studien var å benytte 10 mm ekstrudatprofiler fra kontinuerlig skrueekstrusjon av metaller (Metal Continuous Scew Extrusion, MCSE), en ny metode for fast tilstandsproduksjons av metalltråd for additiv ... -
Work hardening and Portevin-Le Chatelier (PLC) effect in aluminium alloys
(Master thesis, 2019)Bruk av enkelte Al-Mg-legeringer kan føre til utfordringer. Innenfor visse tøyningshastigheter og temperaturer kan det oppstå overflatefeil og tap av mekaniske egenskaper. Dette på grunn av Portevin-Le Chatelier-effekten. ... -
Work hardening and Portevin-Le Chatelier (PLC) effect in aluminium alloys
(Master thesis, 2018)Mechanical testing and microstructure characterization of an AA5182 alloy is performed for use as input for calibration and further development of models for work hardening and dynamic strain aging effects. The experimental ... -
X-ray Microprobe Investigation of Iron During a Simulated Silicon Feedstock Extraction Process
(Peer reviewed; Journal article, 2016)Elemental silicon is extracted through carbothermic reduction from silicon-bearing raw feedstock materials such as quartz and quartzites. We investigate the micron-scale distribution and valence state of iron, a deleterious ... -
XAS investigation of silica aerogel supported cobalt rhenium catalysts for ammonia decomposition
(Peer reviewed; Journal article, 2020)The implementation of ammonia as a hydrogen vector relies on the development of active catalysts to release hydrogen on-demand at low temperatures. As an alternative to ruthenium-based catalysts, herein we report the ... -
XPS Examination of the Oxide-Metal Interface of an Aluminum-Magnesium Alloy Containing Beryllium
(Chapter, 2018)The addition of beryllium to high magnesium aluminum alloys has long been known to cause a significant decrease in the rate of alloy oxidation. A clear understanding of the fundamental mechanism behind this effect is still ... -
Zero strain cathode
(Master thesis, 2023)For å realisere fast fase-batterier som en levedyktig, markedsklar teknologi må problemer med tap av kontakt mellom batterikomponenter løses, da det medfører tap av kapasitet som til slutt ødelegger batteriet. En av ... -
Zinc-rich coatings for improved corrosion resistance of extruded aluminium heat-exchange tubing in acidified chloride solution
(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 ... -
Zirconium hydrogen phosphate as an additive in electrocatalytic layers for the oxygen evolution reaction in PEM water electrolysis
(Journal article, 2015)For reasons of electrode integrity and durability it is desirable to add zirconium hydrogen phosphate to electrocatalytic layers in PEM water electrolysis. Common synthesis methods are frequently associated with an ... -
Zr-Based Metallic Glasses as Biomaterials: Design, Production and Characterization
(Doctoral theses at NTNU;2019:2, Doctoral thesis, 2019)Metallic Glasses (MGs) have a unique non-crystalline structure which is the main reason for their extraordinary properties, e.g. high hardness, good wear resistance, high corrosion resistance, as well as the ability to be ... -
α-Mg primary phase formation and dendritic morphology transition in solidification of a Mg-Nd-Gd-Zn-Zr casting alloy
(Journal article; Peer reviewed, 2016)Microstructure evolution in the commercial Mg-Nd-Gd-Zn-Zr alloy Elektron 21, solidified under nearly isothermal conditions, has been studied via in-situ X-ray radiography. For cooling rates View the MathML source≤0.075 ... -
β- and δ-Al-Fe-Si intermetallic phase, their intergrowth and polytype formation
(Journal article; Peer reviewed, 2019)Crystal structure characteristics of coexisting β and δ phase were investigated in a purely intermetallic Al-Fe-Si alloy and in plate-shaped intermetallic particles formed in a model secondary Al7.1Si1.2Fe0.3Mn alloy. The ...