Assessment of the elongation of the ductility life of a structural aluminum alloy of the Al-Mg-Sc system using thermomechanical processing methods
DOI:
https://doi.org/10.37142/2076-2151/2023-1(52)64Keywords:
plasticity resource, structural materials, thermomechanical processing, aluminum alloy, tensile strength.Abstract
Titov A., Koreva V., Tymoshenko O. Assessment of the elongation of the ductility life of a structural aluminum alloy of the Al-Mg-Sc system using thermomechanical processing methods.
A method has been developed and research has been carried out on extending the ductility life of a structural aluminum alloy of the Al-Mg-Sc system by thermomechanical processing using intermediate annealing during deformation processes. Tests were carried out on samples using a tensile scheme. To conduct an experimental study to determine the elongation of plasticity life by thermomechanical treatment, samples from a 2 mm thick sheet of aluminum alloy of the Al-Mg-Sc system were used. The research results are presented for various coefficients of plasticity resource utilization at the i-th transition. The value of the total realized plasticity has been established, reflecting the influence of intermediate heat treatment operations on the plasticity of the alloy after mechanical treatment by deformation. As a result, it was established that the drop in the efficiency of intermediate annealing is explained by the accumulation of metal damage during preliminary deformation. It has been established that intermediate annealing ensures an increase in the plasticity life of the material by 1.5...1.6 times. The dependence of the total realized plastic deformation on the number of “D+HT” cycles, the dependence of the residual plasticity life on the i-th cycle on the number of cycles, and the dependence of the plasticity resource recovery coefficient on the number of “D+HT” cycles are presented. The limiting surface of the dependence of the plasticity of the material on thermomechanical processing and the number of transitions based on the results of a complete study has also been constructed, which determines the plasticity of the material depending on the number of processing cycles “deformation + heat treatment” and allows you to select the parameters of the workpieces at the design stage of the technological process.
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