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Contribution of grain boundary related strain accommodation to deformation of ultrafine-grained palladium

Ivanisenko, Yu. ; Enikeev, N. A. ; Yang, K. ; Smoliakov, A. ; Soloviev, V. P. ; Fecht, H. ; Hahn, H. (2016):
Contribution of grain boundary related strain accommodation to deformation of ultrafine-grained palladium.
In: Materials Science and Engineering: A, 668, pp. 255-262. Elsevier Science SA, Switzerland, ISSN 09215093,
[Article]

Abstract

Ultrafine-grained Pd specimens with a mean grain size of 130 nm were compressed by 10% in a scanning electron microscope and the strain-induced change in orientations of grains was measured by in-situ electron-backscattering diffraction. A comparison of grain orientations before and after compression straining revealed substantial grain rotations. The analysis of the results performed using polycrystal plasticity simulation showed that the variation of orientations with strain cannot be explained only by crystallographic dislocation slip. A large portion of strain is proved to be accommodated via cooperative non-crystallographic grain rotation. (C) 2016 Elsevier B.V. All rights reserved.

Item Type: Article
Erschienen: 2016
Creators: Ivanisenko, Yu. ; Enikeev, N. A. ; Yang, K. ; Smoliakov, A. ; Soloviev, V. P. ; Fecht, H. ; Hahn, H.
Title: Contribution of grain boundary related strain accommodation to deformation of ultrafine-grained palladium
Language: English
Abstract:

Ultrafine-grained Pd specimens with a mean grain size of 130 nm were compressed by 10% in a scanning electron microscope and the strain-induced change in orientations of grains was measured by in-situ electron-backscattering diffraction. A comparison of grain orientations before and after compression straining revealed substantial grain rotations. The analysis of the results performed using polycrystal plasticity simulation showed that the variation of orientations with strain cannot be explained only by crystallographic dislocation slip. A large portion of strain is proved to be accommodated via cooperative non-crystallographic grain rotation. (C) 2016 Elsevier B.V. All rights reserved.

Journal or Publication Title: Materials Science and Engineering: A
Journal volume: 668
Publisher: Elsevier Science SA, Switzerland
Uncontrolled Keywords: Nanostructured materials, EBSD, Plasticity, Grain boundaries, Deformation mechanisms
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
Date Deposited: 26 Jul 2017 12:24
Official URL: https://doi.org/10.1016/j.msea.2016.05.036
Identification Number: doi:10.1016/j.msea.2016.05.036
Funders: This work was supported by Deutsche Forschungsgemeinschaft, Germany under a Grant FOR714., NAE acknowledges a support through Contract no. 14.B25.31.0017 dated 28.06.2013 by the Russian Ministry for Education and Science.
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