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Updated: Sep 24, 2025
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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
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Nonaffine Strains Control Ductility of Metallic Glasses.
Hui Wang1, Wojciech Dmowski1, Yang Tong1
1Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
Physical Review Letters
|May 2, 2022
Summary
Plasticity in metallic glasses is predicted by how their structure responds to stress, not the initial structure. Local atomic rearrangements under stress correlate with bulk metallic glasses' plastic behavior.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid Mechanics
Background:
- The origin of limited plasticity in metallic glasses remains unclear.
- No direct link has been established between atomic structure and plasticity in these materials.
Purpose of the Study:
- To investigate the relationship between structural response to stress and the plasticity of metallic glasses.
- To propose a new method for predicting plasticity based on elastic deformation behavior.
Main Methods:
- High-energy X-ray diffraction was used to study bulk metallic glasses (BMGs) under uniaxial compression.
- Anisotropic pair distribution functions were evaluated within the elastic limit.
Main Results:
- Local deviations from uniform deformation in the elastic regime strongly correlate with plastic behavior beyond yield.
- This correlation holds across different chemical compositions and sample histories.
- The degree of local structural response to stress predicts plasticity.
Conclusions:
- The response of the glassy structure to applied stress is a key predictor of plasticity.
- Collective local atomic rearrangements under stress promote plasticity in metallic glasses.
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