Revealing cryogenic mechanical behavior and mechanisms in a microstructurally-stable, immiscible nanocrystalline alloy

B. C. Hornbuckle, C. Kale, S. Srinivasan, T. L. Luckenbaugh, Kiran Solanki, K. A. Darling

Research output: Contribution to journalArticle

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.

LanguageEnglish (US)
Pages33-38
Number of pages6
JournalScripta Materialia
Volume160
DOIs
StatePublished - Feb 1 2019

Fingerprint

Nanocrystalline alloys
Cryogenics
cryogenics
cryogenic temperature
twinning
strain rate
grain size
activation
Temperature
transmission electron microscopy
temperature
Twinning
Coarsening
Strain rate
Chemical activation
Transmission electron microscopy
Testing
Experiments

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 journalArticle

Hornbuckle, B. C. ; Kale, C. ; Srinivasan, S. ; Luckenbaugh, T. L. ; Solanki, Kiran ; Darling, K. A. / Revealing cryogenic mechanical behavior and mechanisms in a microstructurally-stable, immiscible nanocrystalline alloy. In: Scripta Materialia. 2019 ; Vol. 160. pp. 33-38.
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