High temperature oxidation behavior in dieless drawing of titanium alloy wires

A finite element model considering high frequency induction heating theorem coupled with the software "DEFORM" is developed to analyze the heat transfer and plastic deformation of the titanium alloy wires during dieless drawing processes. Dieless titanium alloy wire drawing experiments are also conducted. The simulated profiles of the drawn products are compared with the experimental results to validate the FE model. On the other hand, an argon gas chamber is designed and dieless drawing experiments of titanium alloy Ti-6Al-4V wires in air and argon gas are conducted. The effects of the oxide layers on the mechanical properties of the drawn titanium alloy wires obtained by tensile tests are examined. The yield stress, elongation and ultimate tensile strength of the drawn products are affected not only by the forming temperature, but also by the oxide layer on the product surface.