Macroscopic thermoplastic model applied to the high pressure torsion of metallic glasses

Shear deformation generated temperature rise in metallic glasses is estimated in a macroscopic three-dimensional axial symmetric thermoplastic model. Numerical solution of heat-conduction equation provides the time evolution and spatial distribution of temperature for high pressure torsion in the pr...

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Bibliographic Details
Published in:Journal of applied physics 2009-07, Vol.106 (2), p.023531-023531-6
Main Authors: Hobor, Sandor, Revesz, Adam, Kovacs, Zsolt, School of Electrical, Electronic and Mechanical Engineering, University College Dublin, Belfield, Dublin 4
Format: Article
Language:English
Subjects:
DIMENSIONS
DISTRIBUTION
ENERGY TRANSFER
ENTHALPY
EQUATIONS
EVOLUTION
FLUID FLOW
GLASS
HEAT TRANSFER
MATERIALS
MATERIALS SCIENCE
MATHEMATICAL SOLUTIONS
MECHANICAL PROPERTIES
METALLIC GLASSES
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PLASTICITY
PLASTICS
POLYMERS
SPATIAL DISTRIBUTION
SYMMETRY
SYNTHETIC MATERIALS
THERMAL CONDUCTION
THERMODYNAMIC PROPERTIES
THERMOPLASTICS
THICKNESS
THREE-DIMENSIONAL CALCULATIONS
TORSION
TRANSITION HEAT
VISCOUS FLOW
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Summary:Shear deformation generated temperature rise in metallic glasses is estimated in a macroscopic three-dimensional axial symmetric thermoplastic model. Numerical solution of heat-conduction equation provides the time evolution and spatial distribution of temperature for high pressure torsion in the present paper. We have shown that small sample thickness and/or high deformation rate enables the temperature to exceed the glass transition in the entire sample, yielding a transition of the deformation mode from inhomogeneous to homogeneous viscous flow. However, in other cases only a small temperature increase is predicted in line with literature data.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3176950