Consequences of large strain anisotropic work-hardening in cold forging

Abstract The influence of anisotropic work-hardening on the component properties and process forces in cold forging is investigated. focus material behaviour exhibited after strain path reversals. three steels characterized for large monotonic strains (equivalent up to 1.7) subsequent reversals (accumulated 2.5). Tensile tests specimens extracted from rods forward extruded at room temperature reveal an almost linear all investigated steels. application compressive gives insights into non-monotonic behaviour. All previously reported phenomena such as Bauschinger effect, stagnation permanent softening are present intensify with pre-strain. Experimental results 16MnCrS5 were utilized select constitutive models increasing complexity regarding their capability capture work-hardening. best fit between experimental numerical data was obtained by implementation a modified Yoshida-Uemori model, which able observed phenomena. applied simulations single- multi-stage forming processes, revealing significant effect hardening predicted forces, originating process-intrinsic well stages. Selected validated experimentally.