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Title: Model of fracture of metal melts and the strength of melts under dynamic conditions

The development of a continuum model of deformation and fracture of melts is needed for the description of the behavior of metals in extreme states, in particular, under high-current electron and ultrashort laser irradiation. The model proposed includes the equations of mechanics of a two-phase continuum and the equations of the kinetics of phase transitions. The change (exchange) of the volumes of dispersed and carrier phases and of the number of dispersed particles is described, and the energy and mass exchange between the phases due to phase transitions is taken into account. Molecular dynamic (MD) calculations are carried out with the use of the LAMMPS program. The continuum model is verified by MD, computational, and experimental data. The strength of aluminum, copper, and nickel is determined at various temperatures and strain rates. It is shown that an increase in the strain rate leads to an increase in the strength of a liquid metal, while an increase in temperature leads to a decrease in its strength.
Authors:
;  [1]
  1. Chelyabinsk State University (Russian Federation)
Publication Date:
OSTI Identifier:
22472201
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 121; Journal Issue: 1; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; COPPER; DEFORMATION; ELECTRONS; FRACTURES; L CODES; LASER RADIATION; LIQUID METALS; MOLECULAR DYNAMICS METHOD; NICKEL; PARTICLES; PHASE TRANSFORMATIONS; STRAIN RATE; TEMPERATURE DEPENDENCE