Modelling microstructural transformations of nickel base superalloy IN 718 during hot deformation

Abstract

A new Inconel 718 microstructural evolution model that works in tandem with finite element software is described, and is then used to predict the microstructure during the production of a typical two-stage forging route. The model works by grouping similar grains into grainsets and predicting the dislocation density within these grainsets during thermomechanical processing. The model is shown to accurately predict both the grain size and presence of 5 precipitates during the processing route, and displays results both numerically and graphically.