| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure-Property Relationships of Bulk Metallic Glasses
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| Presentation Title |
Dependence of the Nanometer-scale Structural Heterogeneity of a Bulk Metallic Glass on Its Fictive Temperature |
| Author(s) |
Xinzhe Wang, Amit Datye, Shuhan Zhang, John Thornton, Jan Schroers, Udo D. Schwarz |
| On-Site Speaker (Planned) |
Udo D. Schwarz |
| Abstract Scope |
The ability to modify the atomic-scale structure of metallic glasses by processing allows to tailor their mechanical properties. To fully use this ability, it is important to understand local ordering and density fluctuations, both of which manifest as structural heterogeneity. Here, we aim at revealing heterogeneity on the nanometer scale in samples made from Pt57.5Cu14.7Ni5.3P22.5, with virtually atomically flat samples being produced by thermoplastic forming followed by an annealing procedure that sets their fictive temperatures Tf. Atomic force microscopy imaging revealed both topography as well as the sample’s stiffness, modulations of which reflect structural inhomogeneity. The results show that samples featuring Tf’s close to the material’s glass transition temperature Tg of 235 °C are more homogeneous than samples with Tf’s that are lower or higher, a trend that is markedly different from the one found for the absolute values of the average stiffness, which monotonically increases for lower Tf’s. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, |