TY - JOUR
T1 - Microstructure and mechanical property of dual-directional-extruded Mg alloy AZ31
AU - Lu, Liwei
AU - Liu, Tianmo
AU - Jiang, Shan
AU - Pan, Fushen
AU - Liu, Qing
AU - Wang, Zhongchang
PY - 2010/6
Y1 - 2010/6
N2 - We report microstructure evolution and mechanical property of Mg alloy AZ31 processed by a new deformation technique, dual-directional extrusion (DDE). Using optical microscopy, scanning electron microscopy, and electron back scatter diffraction technique, we attribute the significant refinement of original coarse grains in the DDE-processed alloy to the occurrence of dynamic recrystallization. Moreover, we find that low temperature is crucial for yielding fine grain, which consequently results in high micro-hardness and yield stress, large fracture strain, and enhanced elongation. The improved mechanical properties are comparable or even superior to those of the alloy subjected to other deformation techniques, rendering the DDE a promising way for further tailoring properties of Mg-based alloys.
AB - We report microstructure evolution and mechanical property of Mg alloy AZ31 processed by a new deformation technique, dual-directional extrusion (DDE). Using optical microscopy, scanning electron microscopy, and electron back scatter diffraction technique, we attribute the significant refinement of original coarse grains in the DDE-processed alloy to the occurrence of dynamic recrystallization. Moreover, we find that low temperature is crucial for yielding fine grain, which consequently results in high micro-hardness and yield stress, large fracture strain, and enhanced elongation. The improved mechanical properties are comparable or even superior to those of the alloy subjected to other deformation techniques, rendering the DDE a promising way for further tailoring properties of Mg-based alloys.
KW - Dual-directional extrusion
KW - Dynamic recrystallization
KW - Mechanical property
KW - Mg alloy AZ31
KW - Microstructure
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U2 - 10.1016/j.msea.2010.03.009
DO - 10.1016/j.msea.2010.03.009
M3 - Article
AN - SCOPUS:77952878149
VL - 527
SP - 4050
EP - 4055
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 16-17
ER -