Transactions of Materials and Heat Treatment

Title：Numerical simulation and process test on superplastic forming/diffusion bonding for Ti-55 titanium alloy double-layer plate

Authors： Zhou Linghua Shen Zhongwei Xu Tao

Unit： Huzhou Machine Tool Works Co. Ltd.

KeyWords： titanium alloy superplastic forming/diffusion bonding process test metallographic structure inflatable forming

ClassificationCode：TG306

year,vol(issue):pagenumber：2022,47(8):76-82

Abstract：

Superplastic forming/diffusion bonding technology utilizes the characteristics of high elongation and low deformation resistance for titanium alloy under low strain rate and suitable temperature environment, and simultaneously completes inflatable forming and diffusion welding under one-time heating condition to manufacture hollow parts with interlayer. Therefore, for the typical hollow components of titanium alloy double-layer plate, its forming process plan was formulated and the forming process of the plate in the superplastic state was simulated by the finite element analysis method, then the inflatable forming process in the die cavity was observed. Secondly, by analyzing the wall thickness distribution condition of the formed components, the gas pressure-time curve was adjusted and determined to guide the process test. Finally, the process test and quality analysis of the components were carried out, and the metallographic structure of the diffusion bonding under different pressure modes as well as the wall thickness data during the inflatable forming at the same sampling point as the numerical simulation were obtained to verify the deviation between the numerical simulation and the actual forming results.

Funds：

浙江省重点研发计划（2020C01093）

作者简介：周凌华（1987-），男，硕士，高级工程师，E-mail：zhoulh@hzjcc.com；通信作者：沈中伟（1973-），男，本科，工程师，E-mail：shenzw@hzjcc.com

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