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Dynamics and kinetics of dislocations in metals and alloys under dynamic loading

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dc.contributor.author Ilnitski D. en
dc.contributor.author Krasnikov V. en
dc.contributor.author Kuksin A. en
dc.contributor.author Mayer A. en
dc.contributor.author Yanilkin A. en
dc.date.accessioned 2018-10-15T11:17:10Z
dc.date.available 2018-10-15T11:17:10Z
dc.date.issued 2013
dc.identifier.isbn 9781632661258
dc.identifier.issn 2729172
dc.identifier.uri http://dspace.susu.ru/handle/0001.74/19949
dc.description.abstract The work presented is devoted to study the mechanisms and kinetics of plastic deformation of bcc and fcc metals and alloys under shock-wave loading (strain rates > 105 s-1). To study the behavior of metals under conditions described the two scale approach is developed. It comprises molecular dynamics (MD) calculations of dislocation mobility and dislocations nucleation rate and continuum mechanics model with equations for description of elastoplastic deformation, kinetics and dynamics of dislocations. Dislocation velocities as functions of applied shear stress are calculated from MD in a wide temperature range up to the melting point. Velocity-dependent drag coefficient is introduced to approximate the data obtained. The influence of Guinier-Preston (GP) zones on dislocation motion is analyzed. The results obtained are used to evaluate temperature dependence of dynamic flow stress and the evolution of dislocations subsystem under shock loading. Data on the attenuation of the elastic precursor and rare surface velocity profiles calculated for Al are in good agreement with the experiments. Simulation of the free surface velocity profiles during shock-wave loading of AlCu alloys is carried out. © 2013 Materials Research Society. en]
dc.language.iso English
dc.publisher Materials Research Society en]
dc.relation.ispartof Materials Research Society Symposium Proceedings en]
dc.subject Continuum mechanics en]
dc.subject Dynamic loads en]
dc.subject Kinetics en]
dc.subject Metallurgy en]
dc.subject Molecular dynamics en]
dc.subject Shock waves en]
dc.subject Single crystals en]
dc.subject Continuum mechanics models en]
dc.subject Dislocation velocities en]
dc.subject Elastoplastic deformation en]
dc.subject Free surface velocity en]
dc.subject Kinetics and dynamics en]
dc.subject Temperature dependence en]
dc.subject Two-scale approaches en]
dc.subject Wide temperature ranges en]
dc.subject Loading en]
dc.title Dynamics and kinetics of dislocations in metals and alloys under dynamic loading en
dc.type Conference Paper en]
dc.identifier.doi 10.1557/opl.2013.454
dc.identifier.scopus https://www.scopus.com/inward/record.uri?eid=2-s2.0-84900307193&doi=10.1557%2fopl.2013.454&partnerID=40&md5=6a58353204266834e70b9ed2c118cac8
dc.conference.name 21st International Materials Research Congress, IMRC 2012 en]
dc.conference.date 12 August 2012 through 17 August 2012


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