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Shear accelerated crystallization in a supercooled atomic liquid
- Publication Year :
- 2014
- Publisher :
- arXiv, 2014.
-
Abstract
- A bulk metallic glass forming alloy is subjected to shear flow in its supercooled state by compression of a short rod to produce a flat disc. The resulting material exhibits enhanced crystallization kinetics during isothermal annealing as reflected in the decrease of the crystallization time relative to the non-deformed case. The transition from quiescent to shear-accelerated crystallization is linked to strain accumulated during shear flow above a critical shear rate $\dot\gamma_c\approx 0.3$ s$^{-1}$ which corresponds to P\'{e}clet number, $Pe\sim\mathcal{O}(1)$. The observation of shear accelerated crystallization in an atomic system at modest shear rates is uncommon. It is made possible here by the substantial viscosity of the supercooled liquid which increases strongly with temperature in the approach to the glass transition. We may therefore anticipate the encounter of non-trivial shear-related effects during thermoplastic deformation of similar systems.<br />Comment: 7 pages, 7 figures. To appear in Phys. Rev. E
- Subjects :
- Condensed Matter - Materials Science
Amorphous metal
Materials science
Alloy
Thermodynamics
Materials Science (cond-mat.mtrl-sci)
FOS: Physical sciences
engineering.material
Viscous liquid
law.invention
Shear rate
Physics::Fluid Dynamics
Condensed Matter::Soft Condensed Matter
law
engineering
Crystallization
Glass transition
Shear flow
Supercooling
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....2cb87ace8e4a5c57a58143b5318a01b7
- Full Text :
- https://doi.org/10.48550/arxiv.1407.2078