Dynamic continuous recrystallization characteristics in two stage deformation of Mg–3Al–1Zn alloy sheet

Stress Corrosion Cracking Behavior of Fine-Grained AZ61 Magnesium Alloys Processed by Equal-Channel Angular Pressing

“…This indicates that temperature may play a more significant role in grain refinement than processing pass. For the relatively low stacking default energy of Mg matrix [22], there were still considerable dislocations tangled in the matrix as seen from Figure 3b-d, despite the dynamic recovery and recrystallization for the duration of ECAP; more processing passes may lead to higher density of accumulated dislocations. Increased fraction of high-angle boundaries were observed following ECAP processing.…”

Influence of thermomechanical processing on the grain size, texture and mechanical properties of Mg-Al alloys

“…Studies on the dependence of the recrystallization and flow stress with the initial grain size, add evidence in favour of DDRX at temperatures in the range 573-723 K [50,62]. On the other hand, TEM and EBSD-based investigations observed the conversion of dislocation cell walls into subgrain boundaries [45] and, ultimately, into high angle boundaries [51,56,63,64] in the same temperature range (573-723 K). Moreover, Sitdikov et al [51] and Yang et al [13] explain that the bulging process in magnesium involves the formation of low-angle subboundaries, which cut off the bulge protrusion from the grain body, the misorientation of such boundaries gradually increases leading to the development of a high angle boundary.…”

Deformation Structures and Recrystallization in Magnesium Alloys

“…Subsequent continuous rotation of the new substructures results in a progressive increase in misorientation and in the gradual appearance of more and more high angle boundaries (HABs) (Ion et al, 1982;Galiyev et al, 2001;Tan & Tan, 2003). This process is generally referred to as continuous dynamic recrystallization (cDRX) or extended recovery.…”

“…The evolution of such dislocation networks has been studied in detail. (Tan & Tan, 2003). However, TEM-based microtexture investigations do not generally provide statistically relevant analyses because of the very small volumes examined in a single specimen; they also require laborious specimen preparation.…”