Abstract
In the field of aviation and rocket engineering, austenitic chrome-nickel steels are widely employed due to their exceptional properties, including high strength, heat resistance, ductility, and phase stability over a broad range of operating temperatures. Nevertheless, the scarcity of chromium and nickel has necessitated the development and utilization of new high-alloy austenitic steels for these industries, which do not contain the aforementioned deficit alloying elements. Modern high-alloy austenitic steels used in aviation and rocket industries are based on Fe – Mn – Al-Calloys. These steels exhibit lower specific weight, approximately 13-15% less than conventional steels, and possess superior plasticity and the ability to strengthen during deformation. It is essential to note that the high strength of these steels is achieved through the precipitation of complex carbide (Fe, Mn)3 Al particles during thermal treatment, with a crystalline lattice period of d = 0.376 nm.Extensive research has been conducted to establish the temperature-time boundaries of the aging process, its stages, and the mechanisms of strengthening during aging for these steels. Geometric models illustrating the changes in mechanical properties during thermal treatment have been constructed utilizing the mathematical package of functional programming, Wolfram Mathematica. The obtained results have facilitated the formulation of practical recommendations for the development of effective aging regimes for these steels. Mechanisms and temperature-time boundaries for the three stages of the aging process of the steel have been identified, opening the possibility of devising more optimal and productive methods for processing these materials.Hence, research in the domain of high-alloy austenitic steels for aviation and rocket construction is a pertinent and significant direction, as it contributes to the enhancement of quality and reliability in structures employing these materials. The findings of these investigations can be invaluable for advancing contemporary technologies in these fields and ensuring the safety and efficiency of aviation and rocket systems.
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