| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation-induced Manipulation of Defect Structures and Hierarchical Microstructures
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| Presentation Title |
Deformation Mechanisms in Cu-Nb Nanolayered Composite under Pico-indentation and Tribological Testing |
| Author(s) |
Mayur Pole, Zexi Lu, Tanvi Ajantiwalay, Matthew Olszta, Shalini Tripathi, Anqi Yu, Hardeep Mehta, Tianhao Wang, Xiaolong Ma, Arun Devaraj, Bharat Gwalani |
| On-Site Speaker (Planned) |
Mayur Pole |
| Abstract Scope |
Two-phase nanolayered composites with a high density of semicoherent interfaces exhibit excellent mechanical properties and thermal stability. In this study, magnetron sputtered Cu-Nb nanolayered composite having an amorphous interface between Cu and Nb with highly aligned growth twins in Cu is subjected to severe surface deformation by pico-indentation and high strain cyclic shear loading. The subsurface deformed microstructure reveals multiple deformation mechanisms with grain refinement and crack formations in the highly stressed region of the Nb layer and localized crystallization of the amorphous interface. In addition, detwinning of unstable growth twins in the Cu layer under the cyclic shear strain leaves large dislocations sites and loops which are observed both by high-resolution transmission electron microscopy and experiment guided molecular dynamic simulations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Composites, Mechanical Properties |