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

Fingerprint

Superalloys
Stacking faults
Shearing
Precipitates
Creep
Interfacial energy
Topography
Turbomachine blades
Turbines
Single crystals
Temperature

Keywords

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

Cite this

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Prediction of mechanical behaviour in Ni-base superalloys using the phase field model of dislocations. / Vorontsov, V. A.; Voskoboinikov, R. E.; Rae, C. M.F.

In: Advanced Materials Research, Vol. 278, 04.07.2011, p. 150-155.

Research output: Contribution to journalArticle

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