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DTSTAMP:20260416T134715
DTSTART:20130513T113000
SEQUENCE:0
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DTEND:20130513T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/237248
LOCATION:Université de Montréal - Pavillon J.-Armand-Bombardier\, 5155\, 
 chemin de la rampe \, Montréal\, QC\, Canada\, H3T 2B2
SUMMARY:Multi-Scale Modeling of Microstructure in Engineering Alloys: From 
 Atomic to Continuum Methods.
DESCRIPTION:Nikolas Provatas\, McGill University\, Department of Physics an
 d Centre for the Physics of Materials\, 3600 University\, Montreal\, Queb
 ec\, H3A-2T8\, CanadaWe review recent mathematical and numerical innovati
 ons in quantitative multi-scale modeling of microstructure evolution in mu
 lti-component metal alloys. We begin with a brief review of the phase fiel
 d methodology and the role it has played in predicting solidification micr
 ostructure evolution under experimentally relevant casting conditions. Div
 ing down to the atomic scale\, we then review a new hybrid phase field/ato
 mistic methodology\, coined the phase field crystal (PFC) method. The PFC 
 approach has emerged in recent years as an attractive alternative to molec
 ular dynamics for incorporating atomic-scale effects on diffusional times 
 scales that govern most phase transformation. These effects include\, elas
 ticity\, dislocation interaction and flow and polycrystalline boundaries. 
 We present the latest developments of the PFC paradigm in applications inv
 olving structural transformations in N-component alloys. We highlight appl
 ications of the model to grain growth under forced driving\, solute cluste
 ring\, defect stability and solute trapping. We also discuss techniques fo
 r connecting PFC models to higher-level continuum models.Site web du group
 e du  Prof. ProvatasCette conférence est présentée par le RQMP Versant 
 Nord du Département de physique de l'Université de Montréal et le Dép
 artement de génie physique de Polytechnique Montréal.
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