About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior at the Nanoscale VI
|
Presentation Title |
Dynamic Recrystallization-induced Strengthening in Amorphous-nanocrystalline Silver-nickel Nanolaminates |
Author(s) |
Ryan Pringle, Frederic Sansoz |
On-Site Speaker (Planned) |
Frederic Sansoz |
Abstract Scope |
Silver has the highest electrical conductivity, but also is one of the softest metals under mechanical deformation. Therefore, developing means for strengthening silver without reducing its conductivity is critically important for electrode applications. This talk presents an experimental and atomistic simulation study of a nanoscale strengthening mechanism by intercalating nanocrystalline Ag films with thin amorphous Ni layers that characterizes the structure of nanolayered materials synthesized by sputtering. It is found that the addition of Ni nanolayers plays a significant strengthening role, as the layer thickness increases, while dramatically improving the stability of nanosized grains in the Ag films. Furthermore, the normal Hall-Petch breakdown observed in nanocrystalline Ag at a mean grain size of 15 nm disappears in the presence of Ni layers. We show that this phenomenon results from dynamic recrystallization as the Ni nanolayer become less amorphous during deformation, differing from conventional strengthening mechanisms for nanoscale amorphous-crystalline interfaces. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Thin Films and Interfaces, Nanotechnology |