Mu, Xiaoke ; Chellali, Mohammed Reda ; Boltynjuk, Evgeniy ; Gunderov, Dmitry ; Valiev, Ruslan Z. ; Hahn, Horst ; Kübel, Christian ; Ivanisenko, Yulia ; Velasco, Leonardo (2021)
Unveiling the local atomic arrangements in the shear band regions of metallic glass.
In: Advanced Materials, 33 (12)
doi: 10.1002/adma.202007267
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
The prospective applications of metallic glasses are limited by their lack of ductility, attributed to shear banding inducing catastrophic failure. A concise depiction of the local atomic arrangement (local atomic packing and chemical short‐range order), induced by shear banding, is quintessential to understand the deformation mechanism, however still not clear. An explicit view of the complex interplay of local atomic structure and chemical environment is presented by mapping the atomic arrangements in shear bands (SBs) and in their vicinity in a deformed Vitreloy 105 metallic glass, using the scanning electron diffraction pair distribution function and atom probe tomography. The results experimentally prove that plastic deformation causes a reduction of geometrically favored polyhedral motifs. Localized motifs variations and antisymmetric (bond and chemical) segregation extend for several hundred nanometers from the SB, forming the shear band affected zones. Moreover, the variations within the SB are found both perpendicular and parallel to the SB plane, also observable in the oxidation activity. The knowledge of the structural–chemical changes provides a deeper understanding of the plastic deformation of metallic glasses especially for their functional applications and future improvements.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Mu, Xiaoke ; Chellali, Mohammed Reda ; Boltynjuk, Evgeniy ; Gunderov, Dmitry ; Valiev, Ruslan Z. ; Hahn, Horst ; Kübel, Christian ; Ivanisenko, Yulia ; Velasco, Leonardo |
| Art des Eintrags: | Bibliographie |
| Titel: | Unveiling the local atomic arrangements in the shear band regions of metallic glass |
| Sprache: | Englisch |
| Publikationsjahr: | 2021 |
| Ort: | Weinheim |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Materials |
| Jahrgang/Volume einer Zeitschrift: | 33 |
| (Heft-)Nummer: | 12 |
| Kollation: | 10 Seiten |
| DOI: | 10.1002/adma.202007267 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | The prospective applications of metallic glasses are limited by their lack of ductility, attributed to shear banding inducing catastrophic failure. A concise depiction of the local atomic arrangement (local atomic packing and chemical short‐range order), induced by shear banding, is quintessential to understand the deformation mechanism, however still not clear. An explicit view of the complex interplay of local atomic structure and chemical environment is presented by mapping the atomic arrangements in shear bands (SBs) and in their vicinity in a deformed Vitreloy 105 metallic glass, using the scanning electron diffraction pair distribution function and atom probe tomography. The results experimentally prove that plastic deformation causes a reduction of geometrically favored polyhedral motifs. Localized motifs variations and antisymmetric (bond and chemical) segregation extend for several hundred nanometers from the SB, forming the shear band affected zones. Moreover, the variations within the SB are found both perpendicular and parallel to the SB plane, also observable in the oxidation activity. The knowledge of the structural–chemical changes provides a deeper understanding of the plastic deformation of metallic glasses especially for their functional applications and future improvements. |
| Freie Schlagworte: | atom probe tomography, bulk metallic glasses, pair distribution function, shear bands and affected zones, STEM pair distribution function (STEM‐PDF) |
| ID-Nummer: | Artikel-ID: 2007267 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 660 Technische Chemie |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien |
| Hinterlegungsdatum: | 14 Feb 2024 09:06 |
| Letzte Änderung: | 14 Feb 2024 09:06 |
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| Suche nach Titel in: | TUfind oder in Google |
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Unveiling the Local Atomic Arrangements in the Shear Band Regions of Metallic Glass. (deposited 13 Feb 2024 10:45)
- Unveiling the local atomic arrangements in the shear band regions of metallic glass. (deposited 14 Feb 2024 09:06) [Gegenwärtig angezeigt]
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