Fine Grained AZ31 by Conventional Thermo-Mechanical Processing
The magnesium alloy AZ31 was processed by severe hot rolling and annealing. This processing was optimised to produce recrystallised grain sizes as small as 2.2μm. Specimens in the as-rolled condition had a grain size of 0.5μm, and exhibited a yield strength in excess of 350MPa. In the fully recrystallised condition, with a grain size of 2.2μm, the material had a yield strength of 260MPa which is almost twice that of the as-received plate. The ductility of the annealed specimens was also increased compared to the as-received condition. The combination of specific strength and ductility brings this newly processed material into a new property space compared to the other light metals.
M.S. Dargusch & S.M. Keay
N. Stanford "Fine Grained AZ31 by Conventional Thermo-Mechanical Processing", Materials Science Forum, Vols. 618-619, pp. 239-244, 2009