2021 Volume 55 Issue 140 Pages 164-
In scanning electrochemical machining, in which the shape of the product is formed by scanning a tool with a simple shape, every machining point comes in touch with the current density in the order of low-current-density region, high-current-density region, and low-current-density region. In the machining of titanium alloys, which are prone to passivation, a strong passivation film is formed before the tool moves over the machining point. Therefore, the material cannot be eluted even when it comes in touch with the high-current-density region because of the thick film. In this study, to realize the practical use of scanning electrochemical machining, the thickness and residual stress of the passivation film generated on the surface of titanium alloy were measured. In addition, the effect of the passivation film on machining was investigated and discussed.
