Prediction of Forming Limit Diagram Using the Marciniak-Kuczynski Method for Ti-6Al-4V Using Different Material Models

The forming limit diagram (FLD) is a widely used tool to assess the formability of metal sheet [1]. current study aims investigate influence strain rate, material anisotropy and hardening on FLD Ti-6Al-4V predicted by well-known Marciniak-Kuczynski (M-K) method. tensile data quasi-static (8 10 -5 s -1 ), intermediate (0.5 ) dynamic experiments (approximately 1000 are available at three different orientations, with respect rolling direction: 0°, 45° 90°. Different models taken into account. Also, von Mises Hill yield criterion considered. results show that law significant. In particular, most conservative strains Voce because its saturation characteristic. found only affect right part FLD. Regarding rate influence, left mainly dominated amount uniform elongation, while strongly dependent function used. Therefore, for this region effects difficult distinguish. Finally, effect Under conditions, Lankford coefficient seems be driving factor in uniaxial equibiaxial deformation. However, plane conditions exponent dominant.