Experimental and Numerical Analysis of Prestrain on the Formability of Zn-Cu-Ti Alloy Zinc Sheet

The forming limit diagrams (FLDs) characterizing the formability of sheet metals are usually obtained by applying proportional loadings. Nevertheless, industrial processes involve strain path changes that can modify limit-strain values. In addition, for strongly anisotropic such as Zn-Cu-Ti zinc alloy, large differences in curves (FLCs) with respect to rolling direction observed. present work, analysis effect bilinear paths on FLC is addressed both experimental measurements and numerical simulations. For this purpose, a miniature testing device was used allows evaluation influence samples at 0°, 45° 90° cut from non-standard previously subjected prestrain along RD up an early deformation ~0.12. Numerical simulations were carried out using well-known Marciniak Kuczynski (MK) theory conjunction viscoplastic self-consistent (VPSC) crystal plasticity model. order account grain fragmentation process due continuous dynamic recrystallization (CDRX) mechanism, ad hoc short-range interaction (SRE) model included Additionally, measured simulated texture evolution alloy sheets different stages deformations shown. capacity MK-VPSC-SRE validated, limitations simulating development, flow stress curves, including non-proportional path, discussed.