Abstract
In this work, the microstructure evolution of 2519 aluminum alloy was studied at elevated temperatures by the isothermal interrupted hot compression tests on the Gleeble 1500. A static recrystallization kinetic model was established based on the modified Johnson-Mehl-Avrami-Kolmogorov (JMAK) equation and the microstructures of the alloy were analysed by the optical microscope (OM) and transmitted electron microscope (TEM). The finite element method (FEM) with DEFORM-2D was used to investigate the microstructure evolution of 2519 aluminum alloy in multi-pass hot compression process. The results show that the recrystallization fraction at the centre of specimen was larger than that of the surface. With pass increasing from 1 to 4, the average recrystallization fraction increases from 45.5% to 76.4% and the percentage of recrystallization fraction increases as the pass increases, which are well agreement with the experimental results.
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