Kobler, Aaron ; Lohmiller, Jochen ; Schäfer, Jonathan ; Kerber, Michael ; Castrup, Anna ; Kashiwar, Ankush ; Gruber, Patric A. ; Albe, Karsten ; Hahn, Horst ; Kübel, Christian (2013)
Deformation-induced grain growth and twinning in nanocrystalline palladium thin films.
In: Beilstein Journal of Nanotechnology, 4
doi: 10.3762/bjnano.4.64
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The microstructure and mechanical properties of nanocrystalline Pd films prepared by magnetron sputtering have been investigated as a function of strain. The films were deposited onto polyimide substrates and tested in tensile mode. In order to follow the deformation processes in the material, several samples were strained to defined straining states, up to a maximum engineering strain of 10%, and prepared for post-mortem analysis. The nanocrystalline structure was investigated by quantitative automated crystal orientation mapping (ACOM) in a transmission electron microscope (TEM), identifying grain growth and twinning/detwinning resulting from dislocation activity as two of the mechanisms contributing to the macroscopic deformation. Depending on the initial twin density, the samples behaved differently. For low initial twin densities, an increasing twin density was found during straining. On the other hand, starting from a higher twin density, the twins were depleted with increasing strain. The findings from ACOM-TEM were confirmed by results from molecular dynamics (MD) simulations and from conventional and in-situ synchrotron X-ray diffraction (CXRD, SXRD) experiments.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2013 |
| Autor(en): | Kobler, Aaron ; Lohmiller, Jochen ; Schäfer, Jonathan ; Kerber, Michael ; Castrup, Anna ; Kashiwar, Ankush ; Gruber, Patric A. ; Albe, Karsten ; Hahn, Horst ; Kübel, Christian |
| Art des Eintrags: | Bibliographie |
| Titel: | Deformation-induced grain growth and twinning in nanocrystalline palladium thin films |
| Sprache: | Englisch |
| Publikationsjahr: | 24 September 2013 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Beilstein Journal of Nanotechnology |
| Jahrgang/Volume einer Zeitschrift: | 4 |
| DOI: | 10.3762/bjnano.4.64 |
| Kurzbeschreibung (Abstract): | The microstructure and mechanical properties of nanocrystalline Pd films prepared by magnetron sputtering have been investigated as a function of strain. The films were deposited onto polyimide substrates and tested in tensile mode. In order to follow the deformation processes in the material, several samples were strained to defined straining states, up to a maximum engineering strain of 10%, and prepared for post-mortem analysis. The nanocrystalline structure was investigated by quantitative automated crystal orientation mapping (ACOM) in a transmission electron microscope (TEM), identifying grain growth and twinning/detwinning resulting from dislocation activity as two of the mechanisms contributing to the macroscopic deformation. Depending on the initial twin density, the samples behaved differently. For low initial twin densities, an increasing twin density was found during straining. On the other hand, starting from a higher twin density, the twins were depleted with increasing strain. The findings from ACOM-TEM were confirmed by results from molecular dynamics (MD) simulations and from conventional and in-situ synchrotron X-ray diffraction (CXRD, SXRD) experiments. |
| Freie Schlagworte: | ACOM-TEM, deformation mechanism, nanostructured metals, tensile testing, XRD |
| Zusätzliche Informationen: | This article is part of the Thematic Series "Advances in nanomaterials" and is dedicated to Prof. Horst Hahn on the occasion of his 60th birthday. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 17 Feb 2014 11:39 |
| Letzte Änderung: | 17 Feb 2014 11:39 |
| PPN: | |
| Sponsoren: | Financial support through the DFG grant “DFG Forschergruppe714: Plastizität in nanokristallinen Metallen und Legierungen” and the Karlsruhe Nano Micro Facility (KNMF) is gratefully acknowledged. |
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