The Experts below are selected from a list of 42 Experts worldwide ranked by ideXlab platform
L Struder - One of the best experts on this subject based on the ideXlab platform.
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in situ observations of single grain behavior during plastic deformation in polycrystalline ni using energy dispersive Laue Diffraction
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2020Co-Authors: Mohammad Shokr, A Abboud, Christoph Kirchlechner, R Hartmann, L Struder, Nataliya Malyar, Uuganjargal Ariunbold, Christoph Genzel, Manuela Klaus, U PietschAbstract:Abstract Energy dispersive X-Ray Laue Diffraction is applied to investigate the deformation behavior of individual grains in a polycrystalline nickel wire under tensile loading. 38 Laue spots are identified in the Laue pattern which originate from 9 separate grains. The simultaneous measurements of the Laue spot's position and energy obtained by using a 2D energy dispersive detector, allows to track the evolution of the 9 grains through multiple stages of deformation. Angular and spectral elongation (streaking) of the Laue spots increases as tensile loading is increased and is attributed to macroscopic texture changed and strain due to defect accumulation. On the single grain level, a correlation between crystallographic orientation and strain is investigated. Moreover, spatially resolved anisotropic deformation within a single grain is measured to increase at the grain boundaries. Comparison of the grain specific responses allow for development of a deformation scenario for the whole specimen. The presented experiment demonstrates an alternative protocol for the investigation of deformation mechanisms in polycrystalline materials.
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single shot full strain tensor determination with microbeam x ray Laue Diffraction and a two dimensional energy dispersive detector
Journal of Applied Crystallography, 2017Co-Authors: A Abboud, Christoph Kirchlechner, Jozef Keckes, Conka T Nurdan, S Send, J S Micha, O Ulrich, R Hartmann, L StruderAbstract:The full strain and stress tensor determination in a triaxially stressed single crystal using X-Ray Diffraction requires a series of lattice spacing measurements at different crystal orientations. This can be achieved using a tunable X-Ray source. This article reports on a novel experimental procedure for single-shot full strain tensor determination using polychromatic synchrotron radiation with an energy range from 5 to 23 keV. Microbeam X-Ray Laue Diffraction patterns were collected from a copper micro-bending beam along the central axis (centroid of the cross section). Taking advantage of a two-dimensional energy-dispersive X-Ray detector (pnCCD), the position and energy of the collected Laue spots were measured for multiple positions on the sample, allowing the measurement of variations in the local microstructure. At the same time, both the deviatoric and hydrostatic components of the elastic strain and stress tensors were calculated.
Christoph Kirchlechner - One of the best experts on this subject based on the ideXlab platform.
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in situ observations of single grain behavior during plastic deformation in polycrystalline ni using energy dispersive Laue Diffraction
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2020Co-Authors: Mohammad Shokr, A Abboud, Christoph Kirchlechner, R Hartmann, L Struder, Nataliya Malyar, Uuganjargal Ariunbold, Christoph Genzel, Manuela Klaus, U PietschAbstract:Abstract Energy dispersive X-Ray Laue Diffraction is applied to investigate the deformation behavior of individual grains in a polycrystalline nickel wire under tensile loading. 38 Laue spots are identified in the Laue pattern which originate from 9 separate grains. The simultaneous measurements of the Laue spot's position and energy obtained by using a 2D energy dispersive detector, allows to track the evolution of the 9 grains through multiple stages of deformation. Angular and spectral elongation (streaking) of the Laue spots increases as tensile loading is increased and is attributed to macroscopic texture changed and strain due to defect accumulation. On the single grain level, a correlation between crystallographic orientation and strain is investigated. Moreover, spatially resolved anisotropic deformation within a single grain is measured to increase at the grain boundaries. Comparison of the grain specific responses allow for development of a deformation scenario for the whole specimen. The presented experiment demonstrates an alternative protocol for the investigation of deformation mechanisms in polycrystalline materials.
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single shot full strain tensor determination with microbeam x ray Laue Diffraction and a two dimensional energy dispersive detector
Journal of Applied Crystallography, 2017Co-Authors: A Abboud, Christoph Kirchlechner, Jozef Keckes, Conka T Nurdan, S Send, J S Micha, O Ulrich, R Hartmann, L StruderAbstract:The full strain and stress tensor determination in a triaxially stressed single crystal using X-Ray Diffraction requires a series of lattice spacing measurements at different crystal orientations. This can be achieved using a tunable X-Ray source. This article reports on a novel experimental procedure for single-shot full strain tensor determination using polychromatic synchrotron radiation with an energy range from 5 to 23 keV. Microbeam X-Ray Laue Diffraction patterns were collected from a copper micro-bending beam along the central axis (centroid of the cross section). Taking advantage of a two-dimensional energy-dispersive X-Ray detector (pnCCD), the position and energy of the collected Laue spots were measured for multiple positions on the sample, allowing the measurement of variations in the local microstructure. At the same time, both the deviatoric and hydrostatic components of the elastic strain and stress tensors were calculated.
A Abboud - One of the best experts on this subject based on the ideXlab platform.
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in situ observations of single grain behavior during plastic deformation in polycrystalline ni using energy dispersive Laue Diffraction
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2020Co-Authors: Mohammad Shokr, A Abboud, Christoph Kirchlechner, R Hartmann, L Struder, Nataliya Malyar, Uuganjargal Ariunbold, Christoph Genzel, Manuela Klaus, U PietschAbstract:Abstract Energy dispersive X-Ray Laue Diffraction is applied to investigate the deformation behavior of individual grains in a polycrystalline nickel wire under tensile loading. 38 Laue spots are identified in the Laue pattern which originate from 9 separate grains. The simultaneous measurements of the Laue spot's position and energy obtained by using a 2D energy dispersive detector, allows to track the evolution of the 9 grains through multiple stages of deformation. Angular and spectral elongation (streaking) of the Laue spots increases as tensile loading is increased and is attributed to macroscopic texture changed and strain due to defect accumulation. On the single grain level, a correlation between crystallographic orientation and strain is investigated. Moreover, spatially resolved anisotropic deformation within a single grain is measured to increase at the grain boundaries. Comparison of the grain specific responses allow for development of a deformation scenario for the whole specimen. The presented experiment demonstrates an alternative protocol for the investigation of deformation mechanisms in polycrystalline materials.
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single shot full strain tensor determination with microbeam x ray Laue Diffraction and a two dimensional energy dispersive detector
Journal of Applied Crystallography, 2017Co-Authors: A Abboud, Christoph Kirchlechner, Jozef Keckes, Conka T Nurdan, S Send, J S Micha, O Ulrich, R Hartmann, L StruderAbstract:The full strain and stress tensor determination in a triaxially stressed single crystal using X-Ray Diffraction requires a series of lattice spacing measurements at different crystal orientations. This can be achieved using a tunable X-Ray source. This article reports on a novel experimental procedure for single-shot full strain tensor determination using polychromatic synchrotron radiation with an energy range from 5 to 23 keV. Microbeam X-Ray Laue Diffraction patterns were collected from a copper micro-bending beam along the central axis (centroid of the cross section). Taking advantage of a two-dimensional energy-dispersive X-Ray detector (pnCCD), the position and energy of the collected Laue spots were measured for multiple positions on the sample, allowing the measurement of variations in the local microstructure. At the same time, both the deviatoric and hydrostatic components of the elastic strain and stress tensors were calculated.
H S Park - One of the best experts on this subject based on the ideXlab platform.
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strength of shock loaded single crystal tantalum 100 determined using in situ broadband x ray Laue Diffraction
Physical Review Letters, 2013Co-Authors: A J Comley, B R Maddox, Robert E Rudd, S T Prisbrey, James Hawreliak, Daniel Orlikowski, S C Peterson, Joe H Satcher, A J Elsholz, H S ParkAbstract:The strength of shock-loaded single crystal tantalum [100] has been experimentally determined using in situ broadband X-Ray Laue Diffraction to measure the strain state of the compressed crystal, and elastic constants calculated from first principles. The inferred strength reaches 35 GPa at a shock pressure of 181 GPa and is in excellent agreement with a multiscale strength model [N. R. Barton et al., J. Appl. Phys. 109, 073501 (2011)], which employs a hierarchy of simulation methods over a range of length scales to calculate strength from first principles.
R Hartmann - One of the best experts on this subject based on the ideXlab platform.
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in situ observations of single grain behavior during plastic deformation in polycrystalline ni using energy dispersive Laue Diffraction
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2020Co-Authors: Mohammad Shokr, A Abboud, Christoph Kirchlechner, R Hartmann, L Struder, Nataliya Malyar, Uuganjargal Ariunbold, Christoph Genzel, Manuela Klaus, U PietschAbstract:Abstract Energy dispersive X-Ray Laue Diffraction is applied to investigate the deformation behavior of individual grains in a polycrystalline nickel wire under tensile loading. 38 Laue spots are identified in the Laue pattern which originate from 9 separate grains. The simultaneous measurements of the Laue spot's position and energy obtained by using a 2D energy dispersive detector, allows to track the evolution of the 9 grains through multiple stages of deformation. Angular and spectral elongation (streaking) of the Laue spots increases as tensile loading is increased and is attributed to macroscopic texture changed and strain due to defect accumulation. On the single grain level, a correlation between crystallographic orientation and strain is investigated. Moreover, spatially resolved anisotropic deformation within a single grain is measured to increase at the grain boundaries. Comparison of the grain specific responses allow for development of a deformation scenario for the whole specimen. The presented experiment demonstrates an alternative protocol for the investigation of deformation mechanisms in polycrystalline materials.
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single shot full strain tensor determination with microbeam x ray Laue Diffraction and a two dimensional energy dispersive detector
Journal of Applied Crystallography, 2017Co-Authors: A Abboud, Christoph Kirchlechner, Jozef Keckes, Conka T Nurdan, S Send, J S Micha, O Ulrich, R Hartmann, L StruderAbstract:The full strain and stress tensor determination in a triaxially stressed single crystal using X-Ray Diffraction requires a series of lattice spacing measurements at different crystal orientations. This can be achieved using a tunable X-Ray source. This article reports on a novel experimental procedure for single-shot full strain tensor determination using polychromatic synchrotron radiation with an energy range from 5 to 23 keV. Microbeam X-Ray Laue Diffraction patterns were collected from a copper micro-bending beam along the central axis (centroid of the cross section). Taking advantage of a two-dimensional energy-dispersive X-Ray detector (pnCCD), the position and energy of the collected Laue spots were measured for multiple positions on the sample, allowing the measurement of variations in the local microstructure. At the same time, both the deviatoric and hydrostatic components of the elastic strain and stress tensors were calculated.
