Creep and recovery behavior of metallic glasses in a global strain approach within transition state theory
A unique global strain approach based on the transition state theory was proposed to quantify the creep-recovery processes of metallic glasses, in which the structure of glasses is predominantly governed by the macroscopic strain. This methodology allows for the calculation of strain-dependent activ...
| Autores: | , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2026 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/455609 |
| Acceso en línea: | https://hdl.handle.net/2117/455609 https://dx.doi.org/10.1007/s10409-025-25311-x |
| Access Level: | acceso embargado |
| Palabra clave: | Metallic glass Creep Recovery Anelasticity Plasticity Àrees temàtiques de la UPC::Enginyeria dels materials::Metal·lúrgia |
| Sumario: | A unique global strain approach based on the transition state theory was proposed to quantify the creep-recovery processes of metallic glasses, in which the structure of glasses is predominantly governed by the macroscopic strain. This methodology allows for the calculation of strain-dependent activation energy and activation volume for flow defects. The activation energy and volume of creep both increase linearly with the magnitude of strain. Upon the glass-to-liquid transition, they get large and strain-independent, which serves as a signature of the glass transition. During creep recovery, the cooperation of deformation units increases the activation volume but decreases activation energy due to the decrease in free volume. Notably, only a fraction of the anelasticity accumulated during creep persists in the recovery process; the rest is suppressed by structural relaxation. The results introduce physical insights into the deformation and relaxation of metastable solids that are not available in the usual rate-dependent theory developed for crystal plasticity. |
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