Implications of the micromechanical Taylor Factor on work hardening parameters: New perspectives from FFT simulations in DAMASK

Abstract

This study uses Fast Fourier Transform (FFT) simulations in the Düsseldorf Advanced Material Simulation Kit (DAMASK) to investigate the influence of the micromechanical Taylor Factor on the work hardening parameters. Departing from the assumption of a homogeneous deformation in the classical Taylor model, we use the micromechanical Taylor Factor, which takes better account of local grain interactions and strain distributions. Our comparison of simulations using both classical and micromechanical Taylor factors reveal crucial differences in the predicted dislocation mechanisms, leading to different interpretations of work hardening behavior. Our results question the adequacy of conventional models and suggest a more sophisticated understanding of the deformation of polycrystalline materials. The study underscores the importance of an improved modeling approach to characterize deformation and leads to a re-assessment of existing predictive mechanisms in materials science with possible implications for optimizing of material performance.