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Unveiling the Local Atomic Arrangements in the Shear Band Regions of Metallic Glass

Mu, Xiaoke ; Chellali, Mohammed Reda ; Boltynjuk, Evgeniy ; Gunderov, Dmitry ; Valiev, Ruslan Z. ; Hahn, Horst ; Kübel, Christian ; Ivanisenko, Yulia ; Velasco, Leonardo (2024)
Unveiling the Local Atomic Arrangements in the Shear Band Regions of Metallic Glass.
In: Advanced Materials, 2021, 33 (12)
doi: 10.26083/tuprints-00020148
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Item Type: Article
Type of entry: Secondary publication
Title: Unveiling the Local Atomic Arrangements in the Shear Band Regions of Metallic Glass
Language: English
Date: 13 February 2024
Place of Publication: Darmstadt
Year of primary publication: 2021
Place of primary publication: Weinheim
Publisher: Wiley-VCH
Journal or Publication Title: Advanced Materials
Volume of the journal: 33
Issue Number: 12
Collation: 10 Seiten
DOI: 10.26083/tuprints-00020148
Corresponding Links:
Origin: Secondary publication DeepGreen
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.

Uncontrolled Keywords: atom probe tomography, bulk metallic glasses, pair distribution function, shear bands and affected zones, STEM pair distribution function (STEM‐PDF)
Identification Number: Artikel-ID: 2007267
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-201480
Classification DDC: 600 Technology, medicine, applied sciences > 660 Chemical engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
Date Deposited: 13 Feb 2024 10:45
Last Modified: 21 Jun 2024 07:17
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20148
PPN: 519280342
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