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.
| Language | English (US) |
|---|---|
| Pages | 33-38 |
| Number of pages | 6 |
| Journal | Scripta Materialia |
| Volume | 160 |
| DOIs | |
| State | Published - Feb 1 2019 |
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Keywords
- Cryogenic-temperature
- Nanocrystalline
- Transmission electron microscopy
- Zener-Hollomon parameter
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
Cite this
Revealing cryogenic mechanical behavior and mechanisms in a microstructurally-stable, immiscible nanocrystalline alloy. / Hornbuckle, B. C.; Kale, C.; Srinivasan, S.; Luckenbaugh, T. L.; Solanki, Kiran; Darling, K. A.
In: Scripta Materialia, Vol. 160, 01.02.2019, p. 33-38.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Revealing cryogenic mechanical behavior and mechanisms in a microstructurally-stable, immiscible nanocrystalline alloy
AU - Hornbuckle, B. C.
AU - Kale, C.
AU - Srinivasan, S.
AU - Luckenbaugh, T. L.
AU - Solanki, Kiran
AU - Darling, K. A.
PY - 2019/2/1
Y1 - 2019/2/1
N2 - 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.
AB - 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.
KW - Cryogenic-temperature
KW - Nanocrystalline
KW - Transmission electron microscopy
KW - Zener-Hollomon parameter
UR - http://www.scopus.com/inward/record.url?scp=85054048701&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85054048701&partnerID=8YFLogxK
U2 - 10.1016/j.scriptamat.2018.09.035
DO - 10.1016/j.scriptamat.2018.09.035
M3 - Article
VL - 160
SP - 33
EP - 38
JO - Scripta Materialia
T2 - Scripta Materialia
JF - Scripta Materialia
SN - 1359-6462
ER -