| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure and Dynamics of Metallic Glasses
|
| Presentation Title |
Observation of the three-dimensional nanostructure of medium-range order clusters in bulk metallic glasses by atom probe microscopy |
| Author(s) |
Jamie J. Kruzic, Keita Nomoto, Huma Bilal, Bosong Li, Christoph Gammer, Jürgen Eckert, Bernd Gludovatz, Simon Ringer |
| On-Site Speaker (Planned) |
Jamie J. Kruzic |
| Abstract Scope |
Bulk metallic glasses (BMGs) range from tough to brittle depending on their structural state; however, quantifying their structure-property relationships has been challenging. Medium-range order (MRO) clusters have been correlated to mechanical properties in an averaged statistical manner using various diffraction or transmission electron microscopy techniques; however, the composition and the three-dimensional nanostructural arrangements of MRO clusters remains essentially unknown. Here we utilize atom probe tomography (APT) and a novel cluster analysis approach to observe and quantify the three-dimensional distribution, chemical composition, volume fraction, and morphology of nanoscale MRO clusters that have been previously identified using fluctuation electron microscopy. We further use APT to reveal that the cluster volume fraction and distribution control the local BMG hardness differences rather than chemical differences between the clusters. This investigation offers a new approach to studying structure-property relationships for metallic glasses that should have wide implications for the study of amorphous inorganic solids. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, |