Search Results - "HOLMESTAD, R"

Effects of overaging on microstructure and tensile properties of the 2055 Al-Cu-Li-Ag alloy by Balducci, E., Ceschini, L., Messieri, S., Wenner, S., Holmestad, R.

“…The lightweight, unconventional 2055 Al-Cu-Li-Ag alloy exhibits an excellent specific strength in the T83 state, but no literature reports the effects of…”
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Reversal of the negative natural aging effect in Al–Mg–Si alloys by Martinsen, F.A., Ehlers, F.J.H., Torsæter, M., Holmestad, R.

“…The effect of solute clustering on subsequent precipitation has been investigated for three different Al–Mg–Si alloys with similar Mg/Si ratios but different…”
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Atomic structure of solute clusters in Al–Zn–Mg alloys by Lervik, A., Thronsen, E., Friis, J., Marioara, C.D., Wenner, S., Bendo, A., Matsuda, K., Holmestad, R., Andersen, S.J.

“…[Display omitted] Scanning transmission electron microscopy imaging of Al–Zn–Mg alloys has provided new information on the atomic structures of solute rich…”
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Precipitation in an extruded AA7003 aluminium alloy: Observations of 6xxx-type hardening phases by Lervik, A., Marioara, C.D., Kadanik, M., Walmsley, J.C., Milkereit, B., Holmestad, R.

“…Precipitation behavior in an industrially extruded AA7003 alloy has been studied using Transmission Electron Microscopy (TEM) together with Differential…”
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The evolution of precipitate crystal structures in an Al-Mg-Si(-Cu) alloy studied by a combined HAADF-STEM and SPED approach by Sunde, J.K., Marioara, C.D., van Helvoort, A.T.J., Holmestad, R.

“…This work presents a detailed investigation into the effect of a low Cu addition (0.01 at.%) on precipitation in an Al-0.80Mg-0.85Si alloy during ageing. The…”
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Structural phases driven by oxygen vacancies at the La0.7Sr0.3MnO3/SrTiO3 hetero-interface by Nord, M., Vullum, P. E., Moreau, M., Boschker, J. E., Selbach, S. M., Holmestad, R., Tybell, T.

“…An oxygen vacancy driven structural response at the epitaxial interface between La0.7Sr0.3MnO3 films and SrTiO3 substrates is reported. A combined scanning…”
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Enhancing homogenous precipitation and strengthening effectiveness in AlCuMg alloy by Chrominski, W., Christiansen, E., Choinska, E., Holmestad, R., Lewandowska, M.

“…Precipitation strengthening is one of the most effective strengthening mechanisms in metallic alloys. Its effectiveness depends on the number density of small…”
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Study of intergrown L and Q′ precipitates in Al–Mg–Si–Cu alloys by Torsæter, M., Lefebvre, W., Marioara, C.D., Andersen, S.J., Walmsley, J.C., Holmestad, R.

“…► APT and HRTEM study of intergrown precipitate particles in an overaged Al–Mg–Si–Cu (6xxx) alloy. ► The particles are shown to contain the structures of both…”
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Scanning precession electron diffraction data analysis approaches for phase mapping of precipitates in aluminium alloys by Thronsen, E., Bergh, T., Thorsen, T.I., Christiansen, E.F., Frafjord, J., Crout, P., van Helvoort, A.T.J., Midgley, P.A., Holmestad, R.

“…Mapping the spatial distribution of crystal phases with nm-scale spatial resolution is an important characterisation task in studies of multi-phase materials…”
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The evolution of precipitates in an Al–Zn–Mg alloy by Thronsen, E., Shah, S., Hatzoglou, C., Marioara, C.D., Wenner, S., Andersen, S.J., Holmedal, B., Holmestad, R.

“…The precipitation sequence in Al–Zn–Mg alloys has been subject to many revisions over the years as more structural details of the early-stage Guinier-Preston…”
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The effect of Cu on precipitation in Al-Mg-Si alloys by Marioara, C. D., Andersen, S. J., Stene, T. N., Hasting, H., Walmsley, J., Van Helvoort, A. T. J., Holmestad, R.

“…TEM investigations of two alloys isothermally heat treated at 175°C and 260°C show how Cu additions to the Al-Mg-Si system affect precipitation. Both alloys…”
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Nanocrystal segmentation in scanning precession electron diffraction data by BERGH, T., JOHNSTONE, D.N., CROUT, P., HØGÅS, S., MIDGLEY, P.A., HOLMESTAD, R., VULLUM, P.E., HELVOORT, A.T.J. VAN

“…Summary Scanning precession electron diffraction (SPED) enables the local crystallography of materials to be probed on the nanoscale by recording a…”
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The influence of alloy composition on precipitates of the Al-Mg-Si system by Marioara, C D, Andersen, S J, Zandbergen, H W, Holmestad, R

“…To study how changes in solute elements affect precipitation, six Al-Mg-Si alloys aged at 175 °C were investigated by transmission electron microscopy (TEM)…”
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The influence of alloy composition on precipitates of the Al−Mg−Si system by Marioara, C. D., Andersen, S. J., Zandbergen, H. W., Holmestad, R.

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Multislice image simulations of sheared needle‐like precipitates in an Al‐Mg‐Si alloy by CHRISTIANSEN, E., RINGDALEN, I.G., BJØRGE, R., MARIOARA, C.D., HOLMESTAD, R.

“…Summary The image contrast of sheared needle‐like β′′ precipitates in the Al‐Mg‐Si alloy system is investigated with respect to shear‐plane positions, the…”
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Phase stabilization principle and precipitate-host lattice influences for Al–Mg–Si–Cu alloy precipitates by Ehlers, F. J. H., Wenner, S., Andersen, S. J., Marioara, C. D., Lefebvre, W., Boothroyd, C. B., Holmestad, R.

“…In this work, we seek to elucidate a common stabilization principle for the metastable and equilibrium phases of the Al–Mg–Si–Cu alloy system, through combined…”
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Applying precipitate-host lattice coherency for compositional determination of precipitates in Al-Mg-Si-Cu alloys by Torsæter, M., Ehlers, F.J.H., Marioara, C.D., Andersen, S.J., Holmestad, R.

“…The present paper reports experimental and theoretical studies on the structure of the metastable C precipitate forming during precipitation hardening in…”
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Post-β phases and their influence on microstructure and hardness in 6xxx Al-Mg-Si alloys by MARIOARA, C. D, NORDMARK, H, ANDERSEN, S. J, HOLMESTAD, R

“…Starting from solid solution (T4) or a condition with β″ precipitates (T6), three Al-Mg-Si alloys with similar total solute content (1.3 at%), but different…”
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3D modelling of β′′ in Al–Mg–Si: Towards an atomistic level ab initio based examination of a full precipitate enclosed in a host lattice by Ehlers, F.J.H., Dumoulin, S., Holmestad, R.

“…[Display omitted] •First principles based interface energy determination for a physically sized 3D precipitate (β′′).•Distinguishable structural parameters for…”
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First-principles calculations of impurity diffusion activation energies in Al by Sandberg, Nils, Holmestad, Randi

“…We present first-principles density functional theory calculations of the diffusion activation energies of Mg, Si, and the 3d transition metals Sc-Zn in Al. In…”
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