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Theory for multicomponent diffusional kinetics and its application to the reaustenitisation of dual phase and TRIP steels

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

Published
Publication date1/12/2005
Host publicationProceedings of an International Conference on Solid - Solid Phase Transformations in Inorganic Materials 2005, Volume 2: Displacive Transformations
EditorsJames M. Howe
PublisherWiley
Pages801-810
Number of pages10
Volume2
ISBN (Print)0873396081, 9780873396080
<mark>Original language</mark>English
EventInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005 - Phoenix, AZ, United States
Duration: 29/05/20053/06/2005

Conference

ConferenceInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005
Country/TerritoryUnited States
CityPhoenix, AZ
Period29/05/053/06/05

Conference

ConferenceInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005
Country/TerritoryUnited States
CityPhoenix, AZ
Period29/05/053/06/05

Abstract

A general solution for the diffusion equation applied to moving interfaces in multicomponent systems is presented. The solution is simultaneously solved with the chemical potential equations describing multicomponent thermodynamic equilibrium, ensuring local equilibrium at the interface. Phase kinetics and thermodynamics are rigorously linked irrespective of the number of solutes in the system and their difference in diffusivity. The mathematical compactness of the equations resulted in an increase of the computations speed as compared to other approaches. The model is applied to calculate the reaustenitisation kinetics for TRIP and Dual Phase steels with four and more components. The progress in ferrite, cementite and austenite compositions and volume fraction for a variety of heating rates and isothermal holding temperatures is presented.