| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure-Property Relationships of Bulk Metallic Glasses
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| Presentation Title |
Structural Response of Amorphous Solids to Elastic Strains |
| Author(s) |
Wojciech Dmowski, Takeshi Egami |
| On-Site Speaker (Planned) |
Takeshi Egami |
| Abstract Scope |
We used x-ray diffraction to determine atomic strains in glassy solids using pair distribution function. We performed measurements during elastic deformation. In disordered materials every atom has a distinctive atomic environment and thus the response of every atom to the macroscopic stress can be different resulting in non-affine displacements of the atoms. However, there is a different range of non-affine strains in metallic and covalent systems. In metallic systems local relaxation easily accommodates strain and local displacement is compatible with long range strain. In covalent systems strong local bonding inhibits local displacements and strain is accommodated by rotation of molecular units. Thus local deformation is not compatible with long range strain. Interestingly beyond few molecular units deformation in covalent systems looks similar to metallic. We present data for metallic, oxide and polymeric glasses.
Supported by the U.S. Department of Energy, Basic Energy Sciences, Materials Science and Engineering Division. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Characterization, |