%0 Journal Article
%T Grain Refinement and Deformation Mechanisms in Room Temperature Severe Plastic Deformed Mg-AZ31
%A Enrico Knauer
%A Jens Freudenberger
%A Tom Marr
%A Alexander Kauffmann
%A Ludwig Schultz
%J Metals
%D 2013
%I MDPI AG
%R 10.3390/met3030283
%X A Ti-AZ31 composite was severely plastically deformed by rotary swaging at room temperature up to a logarithmic deformation strain of 2.98. A value far beyond the forming limit of pure AZ31 when being equivalently deformed. It is observed, that the microstructure evolution in Mg-AZ31 is strongly influenced by twinning. At low strains the {£¿1011} (10£¿12) and the {£¿1012} (10£¿11) twin systems lead to fragmentation of the initial grains. Inside the primary twins, grain refinement takes place by dynamic recrystallization, dynamic recovery and twinning. These mechanisms lead to a final grain size of ¡Ö1 ¦Ìm, while a strong centered ring fibre texture is evolved.
%K magnesium
%K twinning
%K SPD
%K ultra fine grained
%K wire
%K composite
%K rotary swaging
%U http://www.mdpi.com/2075-4701/3/3/283