Study on the Experiment and Simulation of Titanium Alloy Bellows via Current-Assisted Forming Technology

摘要

Titanium alloy bellows possess significant features, such as light weight, excellent mechanical?properties, and good corrosion?resistance. In this study, current-assisted forming technology which was used to fabricate Ti31 alloy bellows showed a better response than existing forming processes. Moreover, the finite element method was also applied to simulate the current-assisted forming and optimize the forming parameters. The results show that the current-assisted heating curves can be divided into three stages, pre-heating, heating, and holding. The maximum thinning ratio of Ti31 alloy bellows is about 18% after current-assisted forming at 700°C, which corresponds to a current density of 11.0 A/mm_(2). The Ti31 alloy bellows formed by the current-assisted forming process exhibited superior quality with uniform wall?thickness.