Abstract
Here, the Cottrell–Stokes ratio in a microstructurally-stable Cu-3Ta (at.%) nanocrystalline alloy is examined from the standpoint of changes in deformation mechanisms. Toward this, uniaxial compression experiments were performed in the temperature range of 113 K – 273 K. The Cottrell-Stokes ratio at the lowest temperature tested was ~1.3, and the material exhibited a very low strain-rate sensitivity at cryogenic-temperatures. Transmission electron microscopy (TEM) characterization showed negligible average grain size coarsening and a transition in the deformation mechanism toward athermal activation processes such as twinning with the reduction in the testing temperature.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 33-38 |
| Number of pages | 6 |
| Journal | Scripta Materialia |
| Volume | 160 |
| DOIs | |
| State | Published - Feb 1 2019 |
Keywords
- Cryogenic-temperature
- Nanocrystalline
- Transmission electron microscopy
- Zener-Hollomon parameter
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
Fingerprint Dive into the research topics of 'Revealing cryogenic mechanical behavior and mechanisms in a microstructurally-stable, immiscible nanocrystalline alloy'. Together they form a unique fingerprint.
Cite this
Hornbuckle, B. C., Kale, C., Srinivasan, S., Luckenbaugh, T. L., Solanki, K., & Darling, K. A. (2019). Revealing cryogenic mechanical behavior and mechanisms in a microstructurally-stable, immiscible nanocrystalline alloy. Scripta Materialia, 160, 33-38. https://doi.org/10.1016/j.scriptamat.2018.09.035