| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bulk Metallic Glasses XIX
|
| Presentation Title |
Systematic Identification of Local Shear Events during the Plastic Deformation of Colloidal Glasses |
| Author(s) |
Frans A. Spaepen |
| On-Site Speaker (Planned) |
Frans A. Spaepen |
| Abstract Scope |
The plastic deformation of metallic glasses is governed by the irreversible shear of subsets of the system (shear transformation zones; STZs). Each STZ is surrounded by a characteristic elastic strain field, first described by Eshelby. Although the Eshelby strain field is readily observable in two-dimensions, it has been observed only sporadically in three-dimensional systems. Colloidal glasses, in which particles are tracked by confocal microscopy during shear deformation, allow systematic exploration of the occurrence and evolution of Eshelby-type shear events in large experimental systems. Cross-correlation of the three-dimensional Eshelby strain field with the strains that develop during deformation reveals STZ spectra that evolve over the course of the deformation. The corresponding constitutive law can be tested against the macroscopic shear. The stress-strain relation can be measured both macroscopically, by coupling the glass to a calibrated elastic gel, and microscopically from the local structural misanthropy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Modeling and Simulation, Other |