TC4钛合金超塑性半球形壳体壁厚均匀化控制及性能

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

摘要:

球形/胶囊形表面张力贮箱以其结构轻、效率高、可靠性高等优势，在卫星、航天器等领域得到广泛应用。随着航天事业的发展，表面张力贮箱的半球壳体主体壁厚进一步减薄、结构更为复杂、整体性能一致等要求对半球成型工艺带来极大挑战。采用快速正反向超塑成型法，通过调整反向预成型型面，成功实现半球整体壁厚均匀化成型。结果表明，成型后的半球壳体各部位性能、组织形态与初始板材基本一致，半球壳体壁厚具有良好均匀性。

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.