Continuum model of tensile fracture of metal melts and its application to a problem of high-current electron irradiation of metals

A continuum model of the metal melt fracture is formulated on the basis of the continuum mechanics and theory of metastable liquid. A character of temperature and strain rate dependences of the tensile strength that is predicted by the continuum model is verified, and parameters of the model are fit...

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Bibliographic Details
Published in:Journal of applied physics 2015-07, Vol.118 (3)
Main Authors: Mayer, Alexander E., Mayer, Polina N.
Format: Article
Language:English
Subjects:
Aluminum
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Computer simulation
Continuum mechanics
Continuum modeling
Copper
CRITICAL TEMPERATURE
CURRENTS
Electron irradiation
ELECTRONS
FRACTURES
High current
Iron
IRRADIATION
Lead
LIQUIDS
Mathematical models
MECHANICS
Melt fracture
Melt temperature
MELTING POINTS
Melts
METALS
Molecular dynamics
MOLECULAR DYNAMICS METHOD
Nickel
SIMULATION
STRAIN RATE
Temperature
TENSILE PROPERTIES
Tensile strength
Titanium
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Summary:A continuum model of the metal melt fracture is formulated on the basis of the continuum mechanics and theory of metastable liquid. A character of temperature and strain rate dependences of the tensile strength that is predicted by the continuum model is verified, and parameters of the model are fitted with the use of the results of the molecular dynamics simulations for ultra-high strain rates (≥1–10/ns). A comparison with experimental data from literature is also presented for Al and Ni melts. Using the continuum model, the dynamic tensile strength of initially uniform melts of Al, Cu, Ni, Fe, Ti, and Pb within a wide range of strain rates (from 1–10/ms to 100/ns) and temperatures (from melting temperature up to 70–80% of critical temperature) is calculated. The model is applied to numerical investigation of a problem of the high-current electron irradiation of Al, Cu, and Fe targets.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4926861