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Direct Observation of Quadrupolar Strain Fields forming a Shear Band in Metallic Glasses

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, 2023, 35 (25)
doi: 10.26083/tuprints-00024301
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Item Type: Article
Type of entry: Secondary publication
Title: Direct Observation of Quadrupolar Strain Fields forming a Shear Band in Metallic Glasses
Language: English
Date: 7 August 2023
Place of Publication: Darmstadt
Year of primary publication: 2023
Publisher: Wiley-VCH
Journal or Publication Title: Advanced Materials
Volume of the journal: 35
Issue Number: 25
Collation: 9 Seiten
DOI: 10.26083/tuprints-00024301
Corresponding Links:
Origin: Secondary publication DeepGreen
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.

Uncontrolled Keywords: 4D‐STEM, Eshelby inclusions, metallic glass, shear bands, strain fields
Identification Number: 2212086
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-243019
Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
600 Technology, medicine, applied sciences > 660 Chemical engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
11 Department of Materials and Earth Sciences > Material Science > Physical Metallurgy
Date Deposited: 07 Aug 2023 08:08
Last Modified: 17 Oct 2023 07:53
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/24301
PPN: 512229368
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