Abstract
The effect of multidirectional forging on the evolution of the grain structure and the parameters of secondary-phase particles in the aluminum–magnesium alloy (Russian grade 1565ch) has been investigated using scanning and transmission electron microscopy. The multidirectional forging was performed at 200, 350, and 500°C to a total strain of 12. Five multidirectional forging cycles (cumulative strain ∑e = 12) at 350°C lead to fragmentation of particles of crystallization origin, reduce the average particle size of manganese dispersoids by half, and the average grain size by two orders of magnitude from 200 to 1–2 µm. The ultrafine-grained structure forms in 90% of the sample volume.
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