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

Vorontsov, V.A. and Voskoboinikov, R.E. and Rae, C.M.F. (2011) Prediction of mechanical behaviour in Ni-base superalloys using the phase field model of dislocations. Advanced Materials Research, 278. pp. 150-155. ISSN 1022-6680 (https://doi.org/10.4028/www.scientific.net/AMR.278...)

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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.

ORCID iDs

Vorontsov, V.A. ORCID logoORCID: https://orcid.org/0000-0002-1958-0602, Voskoboinikov, R.E. and Rae, C.M.F.;
CORE (COnnecting REpositories)