Morphology Evolution of γ′ Precipitates for Wrought Ni-Based Superalloys

Interdiffusion Behavior of Pt-Diffused γ+γ' Coatings on Ni-Based Superalloys

Platinum-diffused γ+γ' coatings (~20 at.% Al, ~22 at.% Pt) were synthesized on René 142 and René N5 Ni-based superalloys by electroplating the substrates with ~7 μm of Pt, followed by an annealing treatment in vacuum at 1175°C. In order to study the compositional and microstructural evolution of these coatings at elevated temperatures, interdiffusion experiments were carried out on coated speci...

Automated Identification and Characterization of Secondary & Tertiary Γ’ Precipitates in Nickel-based Superalloys (preprint)

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Modeling displacive–diffusional coupled dislocation shearing of c0 precipitates in Ni-base superalloys

In Ni-base superalloys, superlattice extrinsic stacking fault (SESF) shearing of c0 precipitates involves coupled dislocation glide and atomic diffusion. A phase-field model is developed to study this process, in which the free energy of the system is formulated as a function of both displacement and long-range order parameter. The free energy surface is fitted to various fault energy data obta...

MODELLING THE MATERIAL PROPERTIES AND BEHAVIOUR OF Ni-BASED SUPERALLOYS

At the last two Superalloy meetings at Seven Springs, work on the development of thermodynamic modelling tools for application to multi-component Ni-based superalloys has been presented. Such modelling has become quite widespread, providing significant benefit. However, its applicability often falls short from directly providing the information that is actually required and, by itself, cannot b...

Microstructure-Property Relationship in Advanced Ni-Based Superalloys