DIFFUSION WELDING OF TITANIUM THIN-WALLED STRUCTURES WITH T-JOINTS
Оne of the ways to reduce the weight of aircraft is to use large-sized thin-walled shell structures made of titanium alloys in design of the aircraft. An extremely important part of production of such constructions is binding of their elements with each other. The main requirement for the process of joining bars is to provide high strength and reliability without losing the stability of the bars to be connected with each other. The article analyzes the traditional manufacturing techniques for the patterns of this type of constructions. In particular, brazing with solder is used for the production of nozzles for liquid jet engines and impellers of turbo-pump aggregates, contact welding for connecting elements of sound-absorbing structures of aviation equipment and motor-vehicle components, mechanical fastening methods are used in the exit windows of electron accelerators with the output of a beam of accelerated particles into the atmosphere or into a gas of increased pressure. Drawbacks of these technologies and possible design defects associated with the type of binding, welding materials or process parameters are reviewed in the article. Possibilities for manufacturing of the above units by means of diffusion welding are proposed by the aythors. To substantiate the possibility of using diffusion welding in the preparation of permanent joints, the results of mechanical tests and fractographic article provides the studies of the surfaces of damaged assemblies and structures