About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Bulk Metallic Glasses XX
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Presentation Title |
Achieving High Strength and Toughness by Modulating Metallic Glass Composition at the Nanoscale |
Author(s) |
Ali Bagheri Behboud, Amir Motallebzadeh, Sezer Ozerinc |
On-Site Speaker (Planned) |
Sezer Ozerinc |
Abstract Scope |
We report on the effect of compositional heterogeneities on the mechanical behavior of amorphous nanocomposites. The study aims to directly engineer such heterogeneities and gain insight into the resulting ductility improvements recently reported in the literature. The work considered magnetron sputtered ZrTa, which showed a fully amorphous structure over a wide compositional range of 35 – 70at.% Zr. Based on this data, we produced Zr35Ta65/Zr70Ta30 nanolayers with layer thicknesses in the range of 10 – 100 nm. The composite’s hardness was virtually the same as the harder constituent, Zr35Ta65, around 8.5 GPa. The nanolayered structure’s fracture toughness of 4.5 MPa.m^1/2, on the other hand, exceeded those of the constituents in monolithic form. In conclusion, the nanoheterogeneous structure improves the fracture toughness without sacrificing the hardness, providing a promising route for the design of new generation alloys overcoming the strength-ductility trade-off. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Thin Films and Interfaces, Characterization |