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Flow stress simulation of 2026 aluminum alloy under hot compression

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Document pages: 8 pages

Abstract: In order to study the machinability of 2026 aluminum alloy and optimize the hot forming parameters, the hot compression test with strain rate of 0.01 ~ 10 was carried out in the temperature range of 350 ~ 450 ° C   s − 1 and 60 deformation on Gleeble-1500 thermal simulator. The real stress-strain curve obtained shows that the stress increases sharply at small strain, and then moves forward to the steady state, showing dynamic flow softening. At the same time, based on Arrhenius equation, the constitutive equations of flow stress, temperature and strain rate are proposed. However, the difference between the predicted stress and the real stress in the equation is as high as 50.10 . Considering the complex effect of second phase precipitation on the strength of 2026 aluminum alloy, te introduction of a revised equation with the reinforcement of temperature was carried out, fitting well with the experiment data at peak stresses. What is more, both pictures obtained by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were compatible with all the inferences.

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