Direct Observation of Quadrupolar Strain Fields forming a Shear Band in Metallic Glasses
Source abstract
Abstract
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.
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Research context
OpenAlex topics: Metallic Glasses and Amorphous Alloys · Magnetic properties of thin films · Theoretical and Computational Physics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT) 76344 Eggenstein‐Leopoldshafen Germany
Joint Research Laboratory Nanomaterials Technical University of Darmstadt (TUDa) 64287 Darmstadt Germany
Advanced Analysis Center Korea Institute of Science and Technology (KIST) Seoul 02792 Republic of Korea
Karlsruhe Nano Micro Facility (KNMFi) Karlsruhe Institute of Technology (KIT) 76344 Eggenstein‐Leopoldshafen Germany
Korea University of Technology and Education (Koreatech) Cheonan 330708 Republic of Korea
Physical Metallurgy Department of Materials Science Technical University of Darmstadt (TUDa) 64287 Darmstadt Germany
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