| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure and Dynamics of Metallic Glasses
|
| Presentation Title |
Understanding how rejuvenation and residual stress
engineering affect the mechanical properties of metallic glasses
|
| Author(s) |
Daniel Sopu, Florian Spieckermann, Xudong Yuan, Christoph Gammer, Juergen Eckert |
| On-Site Speaker (Planned) |
Daniel Sopu |
| Abstract Scope |
Rejuvenation engineering and residual stress engineering in metallic glasses are interrelated strategies for improving material performance. Here, we focus our attention on clarifying the key factors underlying the rejuvenation process under triaxial compression and distinguishing between structural heterogeneities and elastic fluctuations. High energy scanning X-ray diffraction, micro-indentation and transmission electron microscopy reveal a confined deformation process through an interpenetrating network of multiple shear bands, resulting in large variations in elastic strain and local accumulation of residual stress. Molecular dynamics simulations provide an atomistic understanding of the relationship between fluctuations in elastic and plastic strain and the deformation mechanism in metallic glasses. Both structural and stress heterogeneity lead to shear band multiplication, which consequently increases the macroscopic ductility of metallic glasses. However, the residual stresses significantly increase the strength of the glass and are responsible for the observed strain hardening. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Mechanical Properties, Other |