Abstract
In this work, formability of Ti-6Al-4V alloy has been investigated using deep-drawing and stretching process under warm conditions. Accuracy of finite element simulations in sheet metal forming is significantly dependent on correctness of input properties and appropriate selection of material models. Primarily, the selection of an appropriate yield criterion is vital since it provides precise prediction of the observed initial and subsequent yield behaviours of a material. Barlat 2000 anisotropic yield criterion has been implemented for Ti-6Al-4V alloy at 400 °C. The material constants required for the yield criterion have been determined using uniaxial tensile test at 400 °C. The calculated material constants have been used for finite element (FE) simulation of deep-drawing and stretching process using commercially available DYNAFORM software. FE results have been compared based on thickness distribution, earing profile, dome height and forming limit diagram. Based on the comparison, the Barlat 2000 yield criterion is very well suited for formability prediction of Ti-6Al-4V alloy under warm conditions.
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