About: Mean-field model for the growth and coarsening of stoichiometric precipitates at grain boundaries

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About: Mean-field model for the growth and coarsening of stoichiometric precipitates at grain boundaries Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	In this paper, a model for growth and coarsening of precipitates at grain boundaries is developed. The concept takes into account that the evolution of grain boundary precipitates involves fast short-circuit diffusion along grain boundaries as well as slow bulk diffusion of atoms from the grain interior to the grain boundaries. The mathematical formalism is based on a meanfield approximation, utilizing the thermodynamic extremal principle. The model is applied to the precipitation of aluminum nitrides in microalloyed steel in austenite, where precipitation occurs predominately at the austenite grain boundaries. It is shown that the kinetics of precipitation predicted by the proposed model differs significantly from that calculated for randomly distributed precipitates with spherical diffusion fields. Good agreement of the numerical solution is found with experimental observations as well as theoretical treatment of precipitate coarsening. In this paper, a model for growth and coarsening of precipitates at grain boundaries is developed. The concept takes into account that the evolution of grain boundary precipitates involves fast short-circuit diffusion along grain boundaries as well as slow bulk diffusion of atoms from the grain interior to the grain boundaries. The mathematical formalism is based on a meanfield approximation, utilizing the thermodynamic extremal principle. The model is applied to the precipitation of aluminum nitrides in microalloyed steel in austenite, where precipitation occurs predominately at the austenite grain boundaries. It is shown that the kinetics of precipitation predicted by the proposed model differs significantly from that calculated for randomly distributed precipitates with spherical diffusion fields. Good agreement of the numerical solution is found with experimental observations as well as theoretical treatment of precipitate coarsening. (en)
Title	Mean-field model for the growth and coarsening of stoichiometric precipitates at grain boundaries Mean-field model for the growth and coarsening of stoichiometric precipitates at grain boundaries (en)
skos:prefLabel	Mean-field model for the growth and coarsening of stoichiometric precipitates at grain boundaries Mean-field model for the growth and coarsening of stoichiometric precipitates at grain boundaries (en)
skos:notation	RIV/68081723:_____/10:00352138!RIV11-MSM-68081723
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(OC10029), Z(AV0Z20410507)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Svoboda, Jiří
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky materiálů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	269974
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/10:00352138
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	precipitation; growth; grain boundary (en)
http://linked.open.../riv/klicoveSlovo	grain boundary growth precipitation
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[5191F19F6517]
http://linked.open...i/riv/nazevZdroje	Modelling and Simulation in Materials Science and Engineering
http://linked.open...in/vavai/riv/obor	BJ
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Thermodynamic Modeling of Microstructure Evolution in Nanocomposites
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	18
http://linked.open...iv/tvurceVysledku	Fischer, F. D. Svoboda, Jiří Kozeschnik, E. Radis, R.
http://linked.open...ain/vavai/riv/wos	000272791800011
http://linked.open...n/vavai/riv/zamer	Physical properties of advanced materials in relation to their microstructure and processing
issn	0965-0393
number of pages	19 (xsd:int)

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