In order to fabricate a type of titanium hollow structure

a new process is developed based on hot isostatic pressing (HIP). The hollow ring structure is first decomposed into the skin plus ribs structure

then these substructures are combined together with adding a internal package into the hollow space. After HIP process

rectangular

cylindrical and conical hollow structures are fabricated

under 800-900℃ /100-200MPa/1-3h. The quality of this part is analyzed through profile examination

interface microstructure analysis and mechanical performance test. The results show that the interfacial diffusion bonding ratio of hollow structures almost reaches 100%

and the highest bonding strength reaches more than 980MPa

which is equal to the base metal. The fracture profile of diffusion bonding interface tensile samples shows ductile properties

and the feasibility of this new process is verified

which will provide reference for aerospace applications.