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Разработка новых технологий сварки металлических материалов
In order to develop welding technology of new metallic materials, and evaluate the mechanical properties of welded joints by simulation of welding thermal cycles has been developed and optimized welding technology of metallic materials. Modeling samples subjected to treatment (WTC and thermomechanical impact) tested on a static gap to obtain diagrams of metal deformation in WTC zone (heat affected zone) in real coordinates (with the definition of the relative narrowing and fracture toughness). According to test results, obtained the mechanical properties (relative narrowing and fracture toughness) depending on: - heating temperature at WTC; - static tensile load; - duration of the heat treatment. Physical modeling of WTC, there are additional opportunities related to: - registration of temperature gradient near WTC zone; - quantitative registration of dilatometric effects; - qualitative (estimated) registration of thermal effects, occurring in a cycle of heating-cooling as a result of phase and structure transformations. Thus, the simulation of WTC is possible to obtain experimental thermokinetic curves. Furthermore, it is possible to simulate the appearance and relaxation of residual stress arising in design by welding. What makes it possible to identify their impact on the properties of the resulting welded joints.

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