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2017-06-23
14:38
[PUBDB-2017-06005] Contribution to a conference proceedings/Contribution to a book
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The Population of Twin Related Boundaries in High Purity Nickel as measured with near‐field High Energy X‐ray Diffraction Microscopy
8th International Symposium on Superalloy 718 and Derivatives, Meeting locationPittsburgh, PA, USA, 28 Sep 2014 - 1 Oct 20142014-09-282014-10-01

793-804 (2014)
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2017-06-19
13:47
[PUBDB-2017-05454] Journal Article
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High-Resolution Single-Grain Diffraction of Polycrystalline Materials
ddc:530
Polycrystalline bulk materials are ubiquitous in everyday life, including biological, geological, and engineered structural and functional materials. Their fundamental units are individual grains, which are characterized by their microstructure; i.e., the arrangement of lattice defects [...]
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2017-06-16
10:03
OpenAccess [PUBDB-2017-05205] Journal Article/Contribution to a conference proceedings
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Monitoring microstructural evolution in-situ during cyclic deformation by high resolution reciprocal space mapping
6th International Conference on Fracture Fatigue and Wear, Meeting locationPorto, Portugal, 26 Jul 2017 - 27 Jul 20172017-07-262017-07-27

Journal of physics / Conference Series 843(1), 012031 (2017) [10.1088/1742-6596/843/1/012031]  GO
ddc:530
The recently developed synchrotron technique High Resolution Reciprocal Space Mapping (HRRSM) is used to characterize the deformation structures evolving during cyclic deformation of commercially pure, polycrystalline aluminium AA1050. Insight into the structural reorganization within single grains is gained by in-situ monitoring of the microstructural evolution during cyclic deformation [...]
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2017-06-15
23:02
[PUBDB-2017-05176] Journal Article
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Martensite formation during incremental cooling of Fe-Cr-Ni alloys: An in-situ bulk X-ray study of the grain-averaged and single-grain behavior
ddc:670
The formation of martensite (ε and α′) in metastable austenitic Fe-18Cr-(10-11.5)Ni alloys was investigated in-situ during cooling. High-energy X-rays were used to study the bulk of the alloys [...]
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2017-06-15
22:34
[PUBDB-2017-05175] Journal Article
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Slip systems and dislocation densities in individual grains of polycrystalline aggregates of plastically deformed CoTi and CoZr alloys
ddc:670
A novel X-ray diffraction-based technique for grain-by-grain assessment of dislocation density within polycrystals is applied. The technique discriminates dislocation densities of different slip modes, slip systems and dislocation character [...]
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2017-06-15
22:22
OpenAccess [PUBDB-2017-05174] Journal Article
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A rotational and axial motion system load frame insert for in situ high energy x-ray studies
ddc:530
High energy x-ray characterization methods hold great potential for gaining insight into the behavior of materials and providing comparison datasets for the validation and development of mesoscale modeling tools. A suite of techniques have been developed by the x-ray community for characterizing the 3D structure and micromechanical state of polycrystalline materials; however, combining these techniques with in situ mechanical testing under well characterized and controlled boundary conditions has been challenging due to experimental design requirements, which demand new high-precision hardware as well as access to high-energy x-ray beamlines [...]
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2017-05-30
14:54
OpenAccess [PUBDB-2017-03986] Contribution to a conference proceedings/Contribution to a book
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HR-TEM and HR-PES studies of metal nanoparticles in organic molecular thin film
Atomically Controlled Surfaces, Interfaces and Nanostructures
13th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures, ACSIN 2016, Meeting locationFrascati, Rome, Italy, Italy, 9 Oct 2016 - 14 Oct 20162016-10-092016-10-14

Atomically Controlled Surfaces, Interfaces and Nanostructures
Rome, Italy : Superstripes Press, Rome 2016, Science Series, 9, 206-207 (2016) [10.3204/PUBDB-2017-03986]  GO
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2017-04-07
08:43
OpenAccess [PUBDB-2017-01533] Journal Article
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Unraveling Local Spin Polarization of Zhang-Rice Singlet in Lightly Hole-Doped Cuprates Using High-Energy Optical Conductivity
ddc:530
Unrevealing local magnetic and electronic correlations in the vicinity of charge carriers is crucial in order tounderstand rich physical properties in correlated electron systems. Here, using high-energy optical conductivity(up to 35 eV) as a function of temperature and polarization, we observe a surprisingly strong spin polarizationof the local spin singlet with enhanced ferromagnetic correlations between Cu spins near the doped holesin lightly hole-doped $La_{1.95}Sr_{0.05}Cu_{0.95}Zn_{0.05}O_4$. [...]
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2017-03-29
09:17
OpenAccess [PUBDB-2017-01493] Journal Article
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Transparent polycrystalline cubic silicon nitride
ddc:000
Glasses and single crystals have traditionally been used as optical windows. Recently, there has been a high demand for harder and tougher optical windows that are able to endure severe conditions [...]
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2017-02-14
12:10
OpenAccess [PUBDB-2017-00957] Book/Report/Dissertation / PhD Thesis
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Automatic reduction of large x-ray fluorescence data-sets applied to XAS and mapping experiments
[DESY-THESIS-2017-007]

Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS, 130 pp. (2017) [10.3204/PUBDB-2017-00957] = Universität Paderborn, Diss., 2016  GO
In this thesis two automatic methods for the reduction of large fluorescence data sets are presented.The first method is proposed in the framework of BioXAS experiments. The challenge of this experiment is to deal with samples in ultra dilute concentrations where the signal-to-background ratio is low. [...]
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