Evolution of microstructure during hot incremental disk rolling of a nickel-based super-alloy

Abstract. In the aerospace industry, turbine disk plays a crucial role. Controlling average grain size during hot forming of nickel-based superalloys such as Inconel 718 is critical for production. Recrystallization primarily responsible evolution microstructure process. current study, Finite Element Method (FEM) employed to assess an incremental rolling FEM simulations are used obtain temperature, strain and rate distributions. Then, utilizing these deformation distributions, recrystallization consequent distributions calculated using Johnson-Mehl-Avrami-Kolmogorov (JMAK) equations. Simulations conducted different spindle rates workpiece. This process sensitive temperature meta-dynamic recrystallization. Results show that increases with due inelastic heat generation. Also higher variation through thickness obtained simulation lower since fraction higher.