Multiphase-field model for multicomponent alloys coupled to thermodynamic databases

Nils Warnken, Bernd Böttger, Suzanna Gomez Fries, Steinbach Ingo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The solidification microstructure of Ni-baae superalloys consists basically of primary γ dendrites and secondary precipitations in the interdendritic regions (γ′, laves, carbides etc.). Information about the amount and spatial distribution of these precipitations and also about microsegregation is of great importance for further treatment of cast parts and for the development of new alloys. In order to simulate microstructure formation and microsegregation in directionally solidified samples, a multiphase multicomponent phase field model is used. Multicomponent phase equilibria are obtained online through thermodynamic calculations from thermodynamic databases following the CALPHAD approach. These are coupled to the phase field calculations, which take into account primary solidification as well as secondary phase formation. The microstructure formation of solidification and subsequent homogenisation is simulated using this approach. The calculated element distribution maps are compared to measured ones, which have been obtained from directionally solidified samples.

Original languageEnglish
Title of host publicationModeling of Casting, Welding and Advanced Solidification Processes
Subtitle of host publication10th International Conference on Modeling of Casting, Welding and Advanced Solidification Processes
EditorsD.M. Stefanescu, J.A. Warren, M.R. Jolly, M.J.M. Krane, D.M. Stefanescu, J.A. Warren, M.R. Jolly, M.J.M. Krane
Place of PublicationWarrendale
PublisherThe Minerals, Metals and Materials Society
Pages21-28
Number of pages8
ISBN (Print)0-87339-555-7
Publication statusPublished - 25 May 2003
EventTenth International Conference on Modeling of Casting, Welding and Advanced Solidification Processes - Destin, FL, United States
Duration: 25 May 200330 May 2003

Conference

ConferenceTenth International Conference on Modeling of Casting, Welding and Advanced Solidification Processes
Country/TerritoryUnited States
CityDestin, FL
Period25/05/0330/05/03

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering

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