Prediction of mechanical behaviour in Ni-base superalloys using the phase field model of dislocations

V. A. Vorontsov, R. E. Voskoboinikov, C. M.F. Rae

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The "Phase-Field Model of Dislocations" (PFMD) was used to simulate shearing of gamma-prime precipitate arrays in single crystal turbine blade superalloys. The focus of the work has been on the cutting of the L12 ordered precipitates by a<112>{111} dislocation ribbons during Primary Creep. The Phase Field Model presented incorporates specially developed Generalised Stacking Fault Energy (γ-surface) data obtained from atomistic simulations. The topography of this surface determines the shearing mechanisms observed in the model. The merit of the new γ-surface, is that it accounts for the formation of extrinsic stacking faults, making the model more relevant to creep deformation of superalloys at elevated temperatures.

Original languageEnglish
Pages (from-to)150-155
Number of pages6
JournalAdvanced Materials Research
Volume278
DOIs
Publication statusPublished - 4 Jul 2011

Keywords

  • dislocations
  • effective γ- surface
  • phase field modelling
  • primary creep
  • stacking faults
  • creep deformation of superalloys
  • superalloys

Fingerprint Dive into the research topics of 'Prediction of mechanical behaviour in Ni-base superalloys using the phase field model of dislocations'. Together they form a unique fingerprint.

Cite this