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

Journal Article · Wed Jul 15 00:00:00 EDT 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3176950· OSTI ID:21359323

Hobor, Sandor; Revesz, Adam ^[1]; Kovacs, Zsolt ^[1]

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1. Department of Materials Physics, Eoetvoes University, P.O. Box 32, Budapest H-1518 (Hungary)

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.

• OSTI ID: 21359323
• Journal Information: Journal of Applied Physics, Vol. 106, Issue 2; Other Information: DOI: 10.1063/1.3176950; (c) 2009 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
EQUATIONS
EVOLUTION
GLASS
METALLIC GLASSES
NUMERICAL SOLUTION
PLASTICITY
SPATIAL DISTRIBUTION
SYMMETRY
THERMAL CONDUCTION
THERMOPLASTICS
THICKNESS
THREE-DIMENSIONAL CALCULATIONS
TORSION
TRANSITION HEAT
VISCOUS FLOW
DIMENSIONS
DISTRIBUTION
ENERGY TRANSFER
ENTHALPY
FLUID FLOW
HEAT TRANSFER
MATERIALS
MATHEMATICAL SOLUTIONS
MECHANICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PLASTICS
POLYMERS
SYNTHETIC MATERIALS
THERMODYNAMIC PROPERTIES