Kang, Sangjun ; Wang, Di ; Caron, Arnaud ; Minnert, Christian ; Durst, Karsten ; Kübel, Christian ; Mu, Xiaoke (2023)
Direct observation of quadrupolar strain fields forming a shear band in metallic glasses.
In: Advanced Materials, 35 (25)
doi: 10.1002/adma.202212086
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
For decades, scanning/transmission electron microscopy (S/TEM) techniques have been employed to analyze shear bands in metallic glasses and understand their formation in order to improve the mechanical properties of metallic glasses. However, due to a lack of direct information in reciprocal space, conventional S/TEM cannot characterize the local strain and atomic structure of amorphous materials, which are key to describe the deformation of glasses. For this work, 4-dimensional-STEM (4D-STEM) is applied to map and directly correlate the local strain and the atomic structure at the nanometer scale in deformed metallic glasses. Residual strain fields are observed with quadrupolar symmetry concentrated at dilated Eshelby inclusions. The strain fields percolate in a vortex-like manner building up the shear band. This provides a new understanding of the formation of shear bands in metallic glass.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Kang, Sangjun ; Wang, Di ; Caron, Arnaud ; Minnert, Christian ; Durst, Karsten ; Kübel, Christian ; Mu, Xiaoke |
| Art des Eintrags: | Bibliographie |
| Titel: | Direct observation of quadrupolar strain fields forming a shear band in metallic glasses |
| Sprache: | Englisch |
| Publikationsjahr: | Juni 2023 |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Materials |
| Jahrgang/Volume einer Zeitschrift: | 35 |
| (Heft-)Nummer: | 25 |
| DOI: | 10.1002/adma.202212086 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | For decades, scanning/transmission electron microscopy (S/TEM) techniques have been employed to analyze shear bands in metallic glasses and understand their formation in order to improve the mechanical properties of metallic glasses. However, due to a lack of direct information in reciprocal space, conventional S/TEM cannot characterize the local strain and atomic structure of amorphous materials, which are key to describe the deformation of glasses. For this work, 4-dimensional-STEM (4D-STEM) is applied to map and directly correlate the local strain and the atomic structure at the nanometer scale in deformed metallic glasses. Residual strain fields are observed with quadrupolar symmetry concentrated at dilated Eshelby inclusions. The strain fields percolate in a vortex-like manner building up the shear band. This provides a new understanding of the formation of shear bands in metallic glass. |
| Freie Schlagworte: | 4D-STEME, shelby inclusions, metallic glass, shear bands, strain fields |
| ID-Nummer: | Artikel-ID: 2212086 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > In-Situ Elektronenmikroskopie 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Physikalische Metallkunde |
| Hinterlegungsdatum: | 12 Jun 2024 09:06 |
| Letzte Änderung: | 13 Jun 2024 10:19 |
| PPN: | 519114663 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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Direct Observation of Quadrupolar Strain Fields forming a Shear Band in Metallic Glasses. (deposited 07 Aug 2023 08:08)
- Direct observation of quadrupolar strain fields forming a shear band in metallic glasses. (deposited 12 Jun 2024 09:06) [Gegenwärtig angezeigt]
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