Influence of the Microstructure of Alloys of the Al–Zn–Mg–Cu System on the Mechanism of Fracture of Aircraft Structures

We study V93Т1, V93pchТ3, and 1933Т3 high-strength aluminum alloys of the Al–Zn–Mg–Cu alloying system, which are used in heavily loaded structural elements of aircrafts. The specific features of their microstructures and their influence on the fracture resistance of materials under the action of static and cyclic loads and aggressive media are analyzed.