Advances in Macroscopic and Microscopic Deformation Laws of Titanium Alloy Thin-walled Cylindrical Parts Processed by Hot Power Spinning

Thin-walled titanium cylindrical parts are widely utilized in aerospace and aviation fields due to the advantages of high-performance and lightweight, and they are generally produced by hot power spinning (flow forming). However, the forming of titanium alloy cylindrical part is involved the multi-field, multi-parameter and multi-pass at elevated temperature, thus the macroscopic defects are prone to occurring during deformation, such as build-up, bell-mouth and fracture, etc. Meanwhile, the complicated deformation history in this process results in different microstructure mechanisms, grain morphologies and microstructural parameters, which in turn affect the final mechanical properties of spun components. In this paper, the macroscopic deformation laws and microstructure evolution in the hot power spinning of titanium alloy were reviewed, including the deformation characteristics, the macroscopic defects controlling, facture predicting, and the evolution of microstructure and mechanical properties of titanium alloy spun cylindrical parts. Finally, the key problems and challenges in the current hot power spinning of titanium alloy were summarized, and an outlook of the process was given. This study will provide a fundamental guidance for tailoring the microstructure and the properties while shaping the geometries of thin-walled titanium cylindrical parts in hot power spinning processes.