Search Results - "Poulsen, H. F."

Mapping of individual dislocations with dark‐field X‐ray microscopy by Jakobsen, A. C., Simons, H., Ludwig, W., Yildirim, C., Leemreize, H., Porz, L., Detlefs, C., Poulsen, H. F.

“…This article presents an X‐ray microscopy approach for mapping deeply embedded dislocations in three dimensions using a monochromatic beam with a low…”
Get full text

Dark-field X-ray microscopy for multiscale structural characterization by Simons, H., King, A., Ludwig, W., Detlefs, C., Pantleon, W., Schmidt, S., Stöhr, F., Snigireva, I., Snigirev, A., Poulsen, H. F.

“…Many physical and mechanical properties of crystalline materials depend strongly on their internal structure, which is typically organized into grains and…”
Get full text

Three-Dimensional Orientation Mapping in the Transmission Electron Microscope by Liu, H. H., Schmidt, S., Poulsen, H. F., Godfrey, A., Liu, Z. Q., Sharon, J. A., Huang, X.

“…Over the past decade, efforts have been made to develop nondestructive techniques for three-dimensional (3D) grain-orientation mapping in crystalline…”
Get full text

In Situ Measurement of Grain Rotation during Deformation of Polycrystals by Margulies, L., Winther, G., Poulsen, H. F.

“…Texture evolution governs many of the physical, chemical, and mechanical properties of polycrystalline materials, but texture models have only been tested on…”
Get full text

Reciprocal space mapping and strain scanning using X‐ray diffraction microscopy by Poulsen, H. F., Cook, P. K., Leemreize, H., Pedersen, A. F., Yildirim, C., Kutsal, M., Jakobsen, A. C., Trujillo, J. X., Ormstrup, J., Detlefs, C.

“…Dark‐field X‐ray microscopy is a new full‐field imaging technique for nondestructively mapping the structure of deeply embedded crystalline elements in three…”
Get full text

Lattice rotations of individual bulk grains Part II: correlation with initial orientation and model comparison by Winther, G, Margulies, L, Schmidt, S, Poulsen, H.F

“…The lattice rotations of 95 individual bulk grains during 6% tensile elongation of aluminium have been analysed for correlations between the initial grain…”
Get full text

Grain Nucleation and Growth during Phase Transformations by Offerman, S. E., van Dijk, N. H., Sietsma, J., Grigull, S., Lauridsen, E. M., Margulies, L., Poulsen, H. F., M. Th. Rekveldt, van der Zwaag, S.

“…The mechanical properties of polycrystalline materials are largely determined by the kinetics of the phase transformations during the production process…”
Get full text

Lattice rotations of individual bulk grains: Part I: 3D X-ray characterization by Poulsen, H.F, Margulies, L, Schmidt, S, Winther, G

“…Three-dimensional X-ray diffraction has been applied to characterise the plastic deformation of individual grains deeply embedded in a 99.6% pure aluminium…”
Get full text

DART: a robust algorithm for fast reconstruction of three-dimensional grain maps by Batenburg, K. J., Sijbers, J., Poulsen, H. F., Knudsen, E.

“…A novel algorithm is introduced for fast and nondestructive reconstruction of grain maps from X‐ray diffraction data. The discrete algebraic reconstruction…”
Get full text

Three-dimensional maps of grain boundaries and the stress state of individual grains in polycrystals and powders by Poulsen, H. F., Nielsen, S. F., Lauridsen, E. M., Schmidt, S., Suter, R. M., Lienert, U., Margulies, L., Lorentzen, T., Juul Jensen, D.

“…A fast and non‐destructive method for generating three‐dimensional maps of the grain boundaries in undeformed polycrystals is presented. The method relies on…”
Get full text

Tracking: a method for structural characterization of grains in powders or polycrystals by Lauridsen, E. M., Schmidt, S., Suter, R. M., Poulsen, H. F.

“…A method is presented for fast and non‐destructive characterization of the individual grains inside bulk materials (powders or polycrystals). The positions,…”
Get full text

Recrystallization kinetics of individual bulk grains in 90% cold-rolled aluminium by Lauridsen, E.M, Poulsen, H.F, Nielsen, S.F, Juul Jensen, D

“…The recrystallization kinetics of a 90% cold-rolled commercial aluminium alloy AA1050 annealed at 270 °C has been investigated by use of 3-dimensional X-ray…”
Get full text

A discrete tomography algorithm for improving the quality of three-dimensional X-ray diffraction grain maps by Alpers, A., Knudsen, E., Herman, G. T., Poulsen, H. F.

“…A discrete tomography algorithm is presented for the reconstruction of grain maps based on X‐ray diffraction data. This is the first algorithm for this task,…”
Get full text

Measurements of plastic displacement gradient components in three dimensions using marker particles and synchrotron X-ray absorption microtomography by Nielsen, S.F, Poulsen, H.F, Beckmann, F, Thorning, C, Wert, J.A

“…A universal method is presented for characterising the three-dimensional (3D) plastic displacement gradient field in bulk materials that contain particles or…”
Get full text

Geometrical‐optics formalism to model contrast in dark‐field X‐ray microscopy by Poulsen, H. F., Dresselhaus-Marais, L. E., Carlsen, M. A., Detlefs, C., Winther, G.

“…Dark‐field X‐ray microscopy, DFXM, is a new full‐field imaging technique that non‐destructively maps the structure and local strain inside deeply embedded…”
Get full text

Direct observation of strain in bulk subgrains and dislocation walls by high angular resolution three-dimensional X-ray diffraction by Jakobsen, B., Lienert, U., Almer, J., Poulsen, H.F., Pantleon, W.

“…The X-ray diffraction (XRD) method “high angular resolution 3DXRD” is briefly introduced, and results are presented for a single bulk grain in a…”
Get full text

Generation of grain maps by an algebraic reconstruction technique by Fu, Xiaowei, Poulsen, H. F.

“…A reconstruction method is presented for the generation of three‐dimensional maps of the grain boundaries within powders or polycrystals. The grains are…”
Get full text

X‐ray diffraction microscopy based on refractive optics by Poulsen, H. F., Jakobsen, A. C., Simons, H., Ahl, S. R., Cook, P. K., Detlefs, C.

“…A formalism is presented for dark‐field X‐ray microscopy using refractive optics. The new technique can produce three‐dimensional maps of lattice orientation…”
Get full text

A stochastic algorithm for reconstruction of grain maps of moderately deformed specimens based on X-ray diffraction by Rodek, L., Poulsen, H. F., Knudsen, E., Herman, G. T.

“…In a recent paper [Alpers, Poulsen, Knudsen & Herman (2006). J. Appl. Cryst.39, 582–588] a stochastic algorithm was presented for reconstruction of grain maps…”
Get full text

Kinetics of individual grains during recrystallization by Lauridsen, E.M, Jensen, D.Juul, Poulsen, H.F, Lienert, U

“…A new equipment--the so called 3D x-ray microscope--has been used for in situ investigation of nucleation and growth of individual nuclei during…”
Get full text