Characterization of residual stresses in compressor discs for aeroengines: Neutron diffraction and finite element simulations

Abstract

Knowledge of the evolution of residual stresses developing during fabrication of industrial components is steadily gaining importance. Therefore, the prevailing residual stresses in a number of identical hot-forged water quenched compressor discs made of nickel-base alloy IN718 have been studied by neutron diffraction. Simultaneously, independent finite element simulations (FEM) have been performed characterizing different quenching rates. Furthermore, temperature measurements have been performed during water quenching and the simulated temperatures are compared to the measured ones. The results of the finite element simulations agrees well with those obtained from neutron diffraction and temperature measurements.