About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Nanostructured Materials in Extreme Environments
|
Presentation Title |
Anomalous Mechanical Behavior of Nanocrystalline Binary Alloys under Extreme Conditions |
Author(s) |
S srinivasan, B C Hornbuckle, S Turnage, K Darling, Kiran Solanki |
On-Site Speaker (Planned) |
Kiran Solanki |
Abstract Scope |
Microstructural instability in traditional nanocrystalline-metals limits the understanding of the fundamental effect of grain size on mechanical behavior under extreme environments. In this work, the interplay between Ta concentrations and processing temperature on the resulting microstructure of a powder processed, fully dense Cu-Ta alloy along with their tensile and compressive behavior at different strain rates are investigated to probe the possibility of manipulating or tuning microstructurally dependent parameters to control the flow-stress upturn phenomenon. Consequently, the results reveal that there is a crucial length-scale, i.e., small grain size and appropriate cluster spacing, below which such upturn is damped out. The observation of changes in flow stress upturn behavior is consistent with the observed changes in measured high-rate plasticity, which enhances below the critical length scale. Overall, this work presents a systematic approach to control or engineer reduced high strain rate flow stress upturn behavior in metallic alloys, for high-rate applications. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Nanotechnology, Copper / Nickel / Cobalt |