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The need in carrying out the presented investigations was predetermined by the actual problem of optimizing the process of manufacture of welded structures of a transformable-volume for long-time service under the extreme space conditions. The comparative investigations of elastic-plastic properties, and also the microstructural analysis and micromechanical investigations of welded joints of transformable-volume structures of foil materials, produced at different combinations of parameters of pulse modes of microplama welding were carried out. Feasibility of manufacture of multi-section transformable-volume structure, capable to retain the stability of service characteristics under the conditions of space factors at long-time service was shown. Optimum conditions of formation of permanent joints of thin transformable shells of steel of austenite class, combination of physical-mechanical properties and structural peculiarities of which are maximum close to similar properties of base metal were determined and confirmed experimentally. The result of the presented work demonstrates the feasibility of manufacture of transformable-volume structure with preset properties of welded joints, optimized for long-time service under the action of earlier investigated combinations of service and external factors. 7 Ref., 6 Figures.

Peculiarities in manufacture of thin-walled welded transformable-volume structures for space application