About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XX
|
Presentation Title |
Non-affine Strains in Glassy Solids |
Author(s) |
Wojciech Dmowski, Chae Woo Ryu, Hui Wang, Takeshi Egami |
On-Site Speaker (Planned) |
Wojciech Dmowski |
Abstract Scope |
In simple crystals, at low temperatures, the elastic response can be calculated from affine deformation of the lattice by rescaling of lattice parameters. 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. Being a natural consequence of the disorder of microscopic interactions the non-affine displacement field is responsible, in particular, for the breakdown of Born-Huang’s formulation of elastic moduli. The heterogeneity of elastic deformation has been experimentally demonstrated for metallic glasses. In covalent systems the bond rotation can play crucial role in accommodating the deformation. We examined the response of the atomic structure to the stress of metallic, oxide and polymeric glasses elucidating the r-dependence and length-scale of non-affine strains, using x-ray scattering.
Supported by the U.S. Department of Energy, Basic Energy Sciences, Materials Science and Engineering Division. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Other, Other |