Correlating dynamic relaxation and viscoelasticity in metallic glasses
Relaxation dynamics, essential for the structural evolution of non-equilibrium systems like glassy materials, remain enigmatic. Here, we explore relaxation dynamics and viscoelastic properties in three types of metallic glasses with distinct ß relaxation behavior. In systems with significant ß relax...
| Autores: | , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| 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:2117/424993 |
| Acceso en línea: | https://hdl.handle.net/2117/424993 https://dx.doi.org/10.1007/s11433-023-2345-3 |
| Access Level: | acceso abierto |
| Palabra clave: | Metallic glasses Dynamics relaxation Two-step relaxation Stress relaxation Creep Àrees temàtiques de la UPC::Enginyeria biomèdica::Biomaterials Àrees temàtiques de la UPC::Enginyeria dels materials |
| Sumario: | Relaxation dynamics, essential for the structural evolution of non-equilibrium systems like glassy materials, remain enigmatic. Here, we explore relaxation dynamics and viscoelastic properties in three types of metallic glasses with distinct ß relaxation behavior. In systems with significant ß relaxation, stress relaxation and creep experiments reveal a transition from two-step to one-step relaxation with rising temperature. However, such a phenomenon is absent in systems with weaker ß relaxation. We model the two-step relaxation process using a double Kohlrausch-Williams-Watts equation, and the obtained relaxation times elegantly adhere to the Arrhenius relationship. By combining fitted activation energies with theoretical analysis, we conclusively attribute these relaxation processes to ß relaxation and a relaxation, respectively. Finally, we analyze the relaxation time spectra of two processes and establish a comprehensive picture linking dynamic relaxation with viscoelasticity. Our study provides new strategies for probing the complex relaxation behaviors of glasses from the perspective of viscoelasticity. |
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