Creation of methods for plastic shaping of structures from a new welding alloy of the Al - Mg - Transition metals - Rare earth elements system with high mechanical properties for aerospace engineering
Methods have been developed to ensure high mechanical properties during plastic forming of structures of a new welding alloy of the Al - Mg- Transition Metals - Rare earth elements system for aerospace engineering. A two-stage approach to deformation has been developed, when at the first stage deformation is performed under conditions of large shear deformations for a more uniform redistribution of phase components and a decrease in the size of the grains - homogenization of the material due to mechanical action, and at the second stage - the formation of the structure. Basic knowledge of the effect of plastic deformation in the processes being implemented (pressing of staffs, hot and cold rolling of the strip) on the modification of the metal structure and the physical and mechanical properties of the material of the parts has been obtained. Recommendations for adjusting the constituent components in the alloying system were developed and a new experimental aluminum alloy of the Al-Mg-Cr-La system was proposed. On the basis of the knowledge gained, methods for designing processes and tooling have been developed for the implementation of the technology for the manufacture of efficient structures from the developed alloy for high-tech engineering products, incl. gas turbine engines, rocket technology, etc. The introduction of technologies for the use of a new aluminum alloy for high-tech machine-building products provided a decrease in material consumption by 10-15%, an increase in corrosion resistance by 12-17%, an increase in the resource of use by 1.5÷2.0 times. The new aluminum alloy has been tested at the enterprises of the State Enterprise ZMKB "Progress" them. Academician O.G. Ivchenko and Motor Sich JSC, Zaporozhye in the manufacture of experimental parts, which is confirmed by the relevant acts.