Figure 1. (a) Optical micrograph with the top-right corner inset showing a grain size distribution; (b) inverse pole figure (IPF) map and (c) X-ray diffraction (XRD) pattern of the homogenized AZ31 Mg alloy at 430 C for 3 h. Materials 2016, 9, 433 3 of 8 research [12]. It has been reported that the grains of the AZ31 alloy processed by cross-rolling are finer than those processed by the unidirectional-rolling (Route A). The strain path can define the microstructure of a sample during the rolling deformation process, and grains usually tend to be elongated towards the rolling direction after each rolling [6]. Dynamic recovery (DRV) can be promoted by the constant change of the microstructure, which in turn influences the behavior of the recrystallization [6]. However, the microstructure processed by Route C consists of more coarse grains compared with the ones processed by Route A and B (Figure 3c), which causes an adverse effect on the grain size of the AZ31 alloy, probably due to relatively weak shear deformation between each rolling pass. Figure 1. (a) Optical micrograph with the top-right corner inset showing a grain size distribution; (b) inverse pole figure (IPF)

Figure 1. (a) Optical micrograph with the top-right corner inset showing a grain size distribution; (b)
inverse pole figure (IPF) map and (c) X-ray diffraction (XRD) pattern of the homogenized AZ31 Mg
alloy at 430 C for 3 h.
Materials 2016, 9, 433 3 of 8
research [12]. It has been reported that the grains of the AZ31 alloy processed by cross-rolling are
finer than those processed by the unidirectional-rolling (Route A). The strain path can define the
microstructure of a sample during the rolling deformation process, and grains usually tend to be
elongated towards the rolling direction after each rolling [6]. Dynamic recovery (DRV) can be
promoted by the constant change of the microstructure, which in turn influences the behavior of the
recrystallization [6]. However, the microstructure processed by Route C consists of more coarse
grains compared with the ones processed by Route A and B (Figure 3c), which causes an adverse
effect on the grain size of the AZ31 alloy, probably due to relatively weak shear deformation
between each rolling pass.
Figure 1. (a) Optical micrograph with the top-right corner inset showing a grain size distribution;
(b) inverse pole figure (IPF)