About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XX
|
Presentation Title |
A Spatially Resolved View on Heterogeneous Dynamics in Metallic Glasses |
Author(s) |
Gerhard H. Wilde |
On-Site Speaker (Planned) |
Gerhard H. Wilde |
Abstract Scope |
Local dynamics of atomic rearrangements underlie the characteristic relaxation behavior of glasses. Important properties, such as yielding of metallic glasses also seem to be affected by rearrangements that represent at least a part of the relaxation spectrum. Thus, the atomic dynamics presents an important parameter for understanding and tuning the properties of (metallic) glasses. Measures for modifying the relaxation spectrum are e.g. thermal aging, plastic deformation or cryogenic rejuvenation. Understanding the interdependencies between local structural motifs and their dynamics and macroscopic properties such as long-range diffusion or calorimetric signatures as well as their dependence on macroscopic changes of the relaxational state is as yet incomplete. Selected results obtained by combining different experimental methods, i.e. fluctuation electron microscopy, electron correlation microscopy, radiotracer diffusion and calorimetry serve to discuss apparent correlations between relaxation – or rejuvenation treatments and resulting modifications of medium-range order and the time scales of heterogeneous glassy dynamics. |
Proceedings Inclusion? |
Planned: |
Keywords |
Phase Transformations, Solidification, Characterization |