Coupled modelling of solidification and solution heat treatment of advanced single crystal nickel base superalloy

Nils Warnken, H Larsson, Roger Reed

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Two numerical models to simulate microsegregation and phase formation during directional solidification and subsequent solution heat treatment of an advanced experimental ruthenium containing single crystal nickel base superalloy are tested and compared. The first method is based on a one-dimensional front tracking for the primary solidification and a homogenisation method for the final stages of solidification as well as for the solution heat treatment. Calculations for this model are carried out in one-dimension using cylindrical coordinates. The second is based upon the phase field method, applied to solidification and subsequent solution heat treatment, where calculations are carried out in two-dimension. Both models are coupled to thermodynamic and kinetics databases modelled according to the CALPHAD method. A concept of computer based optimisation of solution heat treatments is proposed. The results show that both methods are capable of handling the complexity of contemporary superalloys, and realistic results are obtained from both models.
Original languageEnglish
Pages (from-to)179-185
Number of pages7
JournalMaterials Science and Technology
Volume25
Issue number2
DOIs
Publication statusPublished - 1 Feb 2009

Keywords

  • Front tracking
  • Microstructure modelling
  • Phase field
  • Thermodynamics
  • Superalloy
  • Solidification
  • Simulation
  • Solution heat treatment

Fingerprint

Dive into the research topics of 'Coupled modelling of solidification and solution heat treatment of advanced single crystal nickel base superalloy'. Together they form a unique fingerprint.

Cite this