An innovative constitutive material model for predicting high temperature flow behaviour of inconel 625 alloy

Abstract Inconel 625 nickel alloy with its attractive high-temperature strength, excellent corrosion and oxidation resistance is mainly used for critical applications in demanding environments, both as-cast wrought conditions. Hot processing of this crucial achieving tailored mechanical properties due to the significant variation microstructural changes varying process parameters like temperature, strain, strain rate. In study, isothermal hot compression tests were carried out at temperatures ranging from 900 1100 °C, under rates 0.01 1 s −1 . The flow curves revealed three stages deformation, including a substantial work-hardening stage followed by dynamic recovery softening. Microstructural observations showed occurrence discontinuous recrystallisation (DDRX) as dominant mechanism during analysis suggested that DRX was more sensitive test temperature compared An innovative material's constitutive model developed, combining Johnson–Cook (JC) Avrami approaches, predict work-hardening, recovery, softening deformation. predicted behavior good agreement experimentally measured data. developed material integrated into DEFORM® 3D finite element (FE) simulation software user subroutine prediction deformation behaviour double truncated cone (DTC) sample. Comparison between data results FE on DTC sample very convergence, indicating suitability proposed material’s large scale simulations. Graphical