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  In situ observations of single grain behavior during plastic deformation in polycrystalline Ni using energy dispersive Laue diffraction

Shokr, M., Kirchlechner, C., Malyar, N. V., Ariunbold, U., Hartmann, R., Strueder, L. W., et al. (2020). 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, 772: 138778. doi:10.1016/j.msea.2019.138778.

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 Creators:
Shokr, Mohammad1, Author              
Kirchlechner, Christoph2, Author              
Malyar, Nataliya Valerievna2, Author              
Ariunbold, Uuganjargal1, Author              
Hartmann, Robert3, Author              
Strueder, Lothar W.1, 4, Author              
Genzel, Christoph5, Author              
Klaus, Manuela5, Author              
Pietsch, Ullrich6, Author              
Affiliations:
1University of Siegen, Solid State Physics, Walter-Flex Str. 3, D-57072, Siegen, Germany, ou_persistent22              
2Nano-/ Micromechanics of Materials, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863401              
3PNSensor GmbH, Otto-Hahn-Ring 6, München, Germany, ou_persistent22              
4PNSensor GmbH, Munich, Germany, ou_persistent22              
5Helmholtz Zentrum Berlin für Materialien und Energie, Glienicker Str. 100, 14109 Berlin, Germany, ou_persistent22              
6Department of Physics, University of Siegen, Siegen, Germany, ou_persistent22              

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Free keywords: Diffraction; Grain boundaries; Tensile stress; Textures; X rays, Anisotropic deformation; Crystal plasticity; Crystallographic orientations; Energy dispersive detectors; Energy-dispersive Laue diffractions; Laue diffraction; Simultaneous measurement; Single grains, Polycrystalline materials
 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. © 2019 Elsevier B.V.

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Language(s): eng - English
 Dates: 2020-01-20
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.msea.2019.138778
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Title: Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing
  Abbreviation : Mater. Sci. Eng. A: Struct. Mater. Prop. Microstruct. Process.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier B.V.
Pages: - Volume / Issue: 772 Sequence Number: 138778 Start / End Page: - Identifier: ISSN: 0921-5093
CoNE: https://pure.mpg.de/cone/journals/resource/954928498465_1