About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Bulk Metallic Glasses XX
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Presentation Title |
Structural Dynamics in the Microplastic Regime of a Zr-based Metallic Glass |
Author(s) |
Amlan Das, Birte Riechers, Peter M. Derlet, Eric M. Dufresne, Robert Maaß |
On-Site Speaker (Planned) |
Amlan Das |
Abstract Scope |
Nominally elastic stresses below yield can cause plastic structural activity without shear banding in a metallic glass (MG). This phenomenon in termed microplasticity and it holds significant promise in altering the structure and therefore properties of MGs. How fundamentally the structure evolves during elastic loading, remains unclear, but we could recently demonstrate both intermittent structural dynamics and increasing relaxation times with increasing stress using in-situ x-ray photon correlation spectroscopy (XPCS, Nature Communications 10, 5009 (2021)). However, these efforts focused on the long-time signature of the microplastic structural dynamics. Here we close this time-scales gap and focus on the very early structural response of a MG during elastic loading. We present the structural activity in a prototypical Zr-based MG prior to, during and immediately after application of a wide range of stresses. The results indicate strong signatures of structural activity even at the lowest possible stress levels we can apply. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, |