Title
Revealing anelasticity and structural rearrangements in nanoscale metallic glass films usingin situTEM diffraction
Author
Rohit Sarkar
Department of Materials Science and Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, USA
Ehsan Izadi
Department of Mechanical and Aerospace Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, USA
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Abstract
We used a novel diffraction-based method to extract the local, atomic-level elastic strain in nanoscale amorphous TiAl films during in situ transmission electron microscopy deformation, while simultaneously measuring the macroscopic strain. The complementary strain measurements revealed significant anelastic deformation, which was independently confirmed by strain rate experiments. Furthermore, the distribution of first nearest-neighbor distances became narrower during loading and permanent changes were observed in the atomic structure upon unloading, even in the absence of macroscopic plasticity. The results demonstrate the capability of in situ electron diffraction to probe structural rearrangements and decouple elastic and anelastic deformation in metallic glasses.
Keywords
Metallic glassatomic rearrangementslocal elastic strainin situ electron diffractionstrain rate experiments
Object type
Language
English [eng]
Persistent identifier
Appeared in
Title
Materials Research Letters
Volume
5
Issue
3
From page
135
To page
143
Publication
Informa UK Limited
Version type
Date issued
2016
Access rights
Rights
Rights statement
© 2016 The Author(s).
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