Blar i Institutt for materialteknologi på utgivelsesdato
Viser treff 481-500 av 2540
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Interfacial and strain energy analysis from ab initio based hierarchical multi-scale modelling: the Al–Mg–Si alloy β'' phase
(Journal article, 2014)Precipitate-host lattice interface studies have not traditionally been viewed as requiring hybrid model schemes for accurate determination of the interfacial and strain energies. On the other hand, the interfaces of main ... -
The Influence of Ni and V Trace Elements on the High Temperature Tensile Properties of A356 Aluminium Foundry Alloy
(Master thesis, 2014)The Objective of the present study is to evaluate the effect of Ni and V trace elements on the High Temperature Tensile properties of A356 unmodified foudry alloy.Hot Tensile Tests were performed. Further microstructural ... -
Investigation of Routes for Improving the Rate Capability of Electrodes in Li-ion Batteries
(Master thesis, 2014)Lithium-ion battery, first introduced to market in 1991 by Sony, is today one of the most popular battery technologies in the world. The development of Li-ion battery applications from portable electronic devices to electric ... -
Piezoelectric K0.5Na0.5NbO3 Ceramics Textured Using Needlelike K0.5Na0.5NbO3 Templates
(Journal article; Peer reviewed, 2014)Improved performance by texturing has become attractive in the field of lead-free ferroelectrics, but the effect depends heavily on the degree of texture, type of preferred orientation, and whether the material is a rotator ... -
Multi-level Modelling of Plastic Anisotropy of Aluminium Alloys Using Crystal Plasticity Models and Advanced Yield Functions
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:164, Doctoral thesis, 2014)The hood, doors and other panels of a car can be made by aluminium sheets, through complex forming operations. Design of forming processes requires trustable models and simulations. Forming properties are different in ... -
FDTD simulations of novel gain media
(Master thesis, 2014)Fourier-Laplace analysis of gain media predicts the existence of novel types of media. In particular it predicts the existence of media refracting positively and negatively at the same time, so-called simultaneous refraction. ... -
Isothermal and non-isothermal annealing of cold-rolled Al-Mn-Fe-Si alloys with different microchemistry states
(Journal article, 2014)Investigation of the microstructural evolution of Al-Mn-Fe-Si alloys during annealing after cold rolling has been carried out. The effect of microchemistry state in terms of Mn in solid solution, constituents, size and ... -
Anelastic properties of La0.6Sr0.4Co1−yFeyO3-δ at high temperatures
(Journal article; Peer reviewed, 2014)The dynamic amplitude dependence of the Young's modulus and the internal friction of La0.6Sr0.4Co0.2Fe0.8O3 −δ (LSCF6428) at high temperatures were evaluated by resonance measurements. At the temperatures from room temperature ... -
Chemical expansion due to hydration of proton conducting perovskite oxide ceramics
(Journal article; Peer reviewed, 2014)The crystal structures of proton conducting BaZr1-xYxO3-x/2 (BZY05-BZY20) and BaCe0.8Y0.2O2.9 (BCY20) during hydration/dehydration has been studied by in situ high temperature X-ray diffraction and thermal analysis. A ... -
Probing the electronic properties of p-doped gallium arsenide nanowires
(Master thesis, 2014)Probing the electronic properties of nm-scaled object is a challenge but is required for doping optimalization and using the nm-scaled objects as building blocks in future devices. In the present study, electron beam induced ... -
Structure–properties relationship in RE3−xMgxNi9H10–13 (RE = La,Pr,Nd) hydrides for energy storage
(Journal article; Peer reviewed, 2014)Ternary RE3xMgxNi9 intermetallics are promising battery electrode materials. Studies of the structure– properties relationships in the (La,Pr,Nd)3xMgxNi9H10–13 hydrides and initial intermetallics revealed the following: ... -
Characterization of Screw Extruded Rapid Solidified AA6061
(Master thesis, 2014)By using rapid solidified aluminium as feedstock and a novel extrusion method, i.e. screw extrusion, it is possible to extrude aluminium continuously. Due to rapid solidification, the base material can have small grain ... -
EBSD karakterisering av et austenittisk rustfritt AISI 304 stål under in situ deformasjon ved ulike temperaturer
(Master thesis, 2014)Denne masteroppgaven kartlegger martensittdannelsen i et austenittisk rustfritt stål som følge av ytre påkjenninger i form av temperatur og spenning. Dette er gjort ved hjelp av in situ deformasjon i skanning elektronmikroskop ... -
The influence of microchemistry on the softening behaviour of two cold-rolled Al-Mn-Fe-Si alloys
(Journal article, 2014)The influence of microchemistry on the softening behaviour of two cold-rolled Al–Mn–Fe–Si alloys with different initial amounts of Mn (0.4 and 1.0 wt%) is studied. In addition to their as-cast conditions, the supersaturated ... -
Microstructural evolution during isothermal annealing of a cold-rolled Al-Mn-Fe-Si alloy with different microchemistry states
(Journal article, 2014)In this paper, investigations of the softening behaviour of a supersaturated Al-Mn-Fe-Si alloy during annealing after cold rolling have been carried out. Two different homogenization conditions were considered, of which ... -
Shielded Active Gas Forge Welding of L80 Steel for Offshore Applications
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:33, Doctoral thesis, 2014) -
Grain refinement of commercial EC Grade 1070 Aluminum alloy for electrical application
(Master thesis, 2014)The aluminium alloys for electrical conductivity applications are not grain refined since the addition of grain refiners might decrease their electrical conductivity by inserting impurities into the melt. Still, non-grain ... -
Internal Gettering of Iron at Extended Defects
(Journal article; Peer reviewed, 2014)The role of iron in crystalline silicon solar cells has been extensively investigated, yet the interaction mechanisms with structural defects have not been fully understood. In this work we have investigated a multicrystalline ... -
Elektrisk resistivitet i industrielle SiC-lag
(Master thesis, 2014)Det antas at 1% av strømmen som går gjennom en ovn som produserer silisiumslegeringer vil gå gjennom chargen mellom elektrodene, resten vil gå gjennom lysbuen som går fra elektroden og til metallbadet. Det er ukjent hvor ... -
Influence of dispersoids on grain subdivision and texture evolution in aluminium alloys during cold rolling
(Journal article, 2014)Al-Mn alloys containing similar amounts of solutes but various dispersoid densities were cold rolled. The grain subdivision and micro-texture were examined by electron backscatter diffraction and orientation imaging ...