| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure-Property Relationships of Bulk Metallic Glasses
|
| Presentation Title |
Tailoring Structure, Residual Stresses and Heterogeneity in Metallic Glasses |
| Author(s) |
Jurgen H. Eckert |
| On-Site Speaker (Planned) |
Jurgen H. Eckert |
| Abstract Scope |
Residual stress engineering is widely used in the design of new advanced lightweight materials. For metallic glasses the attention has been on structural changes and rejuvenation process. High energy scanning x-ray diffraction strain mapping reveals large elastic fluctuations in metallic glasses after deformed under triaxial compression. Transmission electron microscopy proves that structural rejuvenation under room temperature deformation relates to the shear band formation that closely correlates to the underlying distribution of elastic heterogeneities. Micro-indentation hardness mapping hints at an unsymmetrical hardening/softening after compression and further reveals the competing effects of stress and structure modulation. Molecular dynamics simulations provide an atomistic understanding of the correlation between shear banding and fluctuations in the local strain/stress heterogeneity. Thus, stress engineering and elastic heterogeneity together with structure modulation is a promising approach for designing metallic glasses with enhanced ductility and strain hardening ability. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Mechanical Properties, Characterization |