Abstract: When the cumulative deformation amount was constant, the processes of rolling with 9, 5, 3, and 2 passes on the asynchronous rolling mill, and the average pass reduction ratios of 16%, 27%, 40% and 55%, respectively, were used for strong shear rollied 6016 aluminum alloy sheet, which was then solution treated at 540 ℃ for 30 min in a heating furnace. The microstructure characteristics and macroscopic texture were analyzed by means of optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction (XRD). The results show that with the increase of pass reduction, the number of the second phase increases, and the shear texture strength of E, F and r-cube shear texture increases. After solution treatment, the strength of shear texture slightly declines. After the solution treatment, the matrix grains and the second phase particles of the alloy sheet with a pass reduction of 55% are refined, the average grain size is 44.5 μm, and the size of second phase particle ranges from 0.3 μm to 0.5 μm, and which is dispersed in the matrix.

Key words: pass reduction, asynchronous rolling, aluminum alloy, solution, microstructure