Wall Thickness Homogenization Control and Performance of Superplastically Formed Hemispherical Shell of TC4 Titanium Alloy

Abstract:

Spherical and capsule-shaped surface tension tanks are widely used in satellite, spacecraft, and other fields due to their advantages of lightweight structure, high efficiency, and high reliability. With the advancement of space exploration, the demands for thinner walls, more complex structures, and uniform overall performance in the hemispherical shells of these tanks present significant challenges for hemispherical shell forming technique. A hemispherical shell with uniform wall thickness was prepared using the rapid direct-and-reverse superplastic forming method. Results reveal that the properties and microstructure of each section of the formed hemisphere shell are consistent with those of the initial plate, and the overall shell thickness is highly uniform.