Characterising compositional and microstructural effects on precipitation hardening in nickel and cobalt base superalloys

  • Vorontsov, V. (Speaker)
  • Hikmatyar Hasan (Contributor)
  • Peter Mlkvik (Contributor)
  • Peter Haynes (Contributor)

Activity: Talk or presentation typesInvited talk


To overcome the limitations of classical mathematical models for precipitation hardening, modern computational approaches can be used to quantify the resolved shear stresses during dislocation precipitate interactions. This allows the development of near complete non-empirical descriptions of strengthening effects that can accelerate the design and optimisation of future superalloys. A discussion is hereby presented, with reference to electon microscope observations, on how a universal model for precipitation hardening may be developed for multi-component nickel and cobalt-based superalloys using automated multi-scale computer simulations. A combination of phase-field modelling with first-principles simulations is used to explore compositional and microstructural effects on precipitation hardening mechanisms during yield and primary creep. The applicability of the method to optimising the microstructure for a given alloy composition is explored. Finally, the effect of solute segregation at stacking faults on the shearing of γ′ precipitates during primary creep is also investigated.
Period21 Sept 2022
Event titleEuroSuperalloys 2022: 4th European Symposium on Superalloys and their Applications
Event typeConference
LocationBamberg, GermanyShow on map
Degree of RecognitionInternational