Characteristics of Strain-Induced Boundary Migration as Evaluated by the Crystal Rotation Axis Method in (001) [100] and (112) [11\\bar1] Aluminum Bicrystal Deformed by Plane-Strain Compression

Abstract

An aluminum bicrystal with (001) [100] and (112) [11 " 1 1] orientation was deformed by plain-strain compression to a strain of 0.34. The types of slip systems responsible for producing crystal rotations relative to the initial orientations were clarified by the crystal rotation axis method. In the (001) [100] crystal, an affected zone developed along the grain boundary, which revealed a variety of slip systems in operation; the operation of some of these systems could be predicted from the Schmid factor while that of the remaining systems could not. The unpredictable slip systems were activated by the formation of cross slips. After annealing at 400 C for 30 s, recrystallization that occurred was characterized by strain-induced boundary migration. The recrystallized area had the same crystal orientation as that of the affected zone of the (001) [100] crystal. By using the crystal rotation axis method, it was determined that the affected zone was the origin of the strain-induced boundary migration.

The effect of thermomechanical controlled processing on recrystallisation and subsequent deformation-induced ferrite transformation textures in microalloyed steels

“…3) for both steels [23,24]. This suggests that the strain-induced boundary migration (SIBM) mechanism was dominant during recrystallisation at 1200°C, as reported by several researchers [23,25,26]. A characteristic feature of this mechanism is that the new grains have similar orientations to the old grains from which they have grown [27].…”

“…5), but they are different from the recrystallisation textures at 1100°C (Fig. 3) for both steels [23,24]. This suggests that the strain-induced boundary migration (SIBM) mechanism was dominant during recrystallisation at 1200°C, as reported by several researchers [23,25,26].…”

Thermomechanical processing route to achieve ultrafine grains in low carbon microalloyed steels

“…Therefore, the formation of nanoscale Fe 3 C within the DIFT also suggests a massive transformation for the DIFT. Ti steels and showed that the recrystallisation texture (after 10s at 1200°C) was closely related to the deformation texture after roughing deformation at 850°C for both steels, but different from the recrystallization textures after heat treatment at 1100°C for 30s [43]. This suggests that the strain-induced boundary migration (SIBM) mechanism was dominant during recrystallisation, as reported by several researchers [43][44][45].…”

“…Ti steels and showed that the recrystallisation texture (after 10s at 1200°C) was closely related to the deformation texture after roughing deformation at 850°C for both steels, but different from the recrystallization textures after heat treatment at 1100°C for 30s [43]. This suggests that the strain-induced boundary migration (SIBM) mechanism was dominant during recrystallisation, as reported by several researchers [43][44][45]. The SIBM would have probably left irregular grain boundaries, with serrations that could act as preferential sites for DIFT.…”

An Algorithm to Analyze Electron Backscatter Diffraction Data for Grain Reconstruction: from Methodology to Application

“…where b s and n s are the slip direction and slip plane normal, respectively, for a given slip system, s. The Taylor axes as well as the Schmid factors of the 12 slip systems in grain ''B'' and grain ''F'' are given in Table 3. Due to the reaction stresses [33] imposed by the channel die, the potential active slip systems are b1, b2, b3, d2, and d3 in grain B and a2, b1, b3, and d2 in grain F. The practically active slip systems can be estimated based on the crystal rotation relative to the initial orientation by matching the Taylor axis for a given combination of slip systems to the experimentally measured lattice rotation axis [22,34,35]. Figure 7a gives the positions of the \112[, \110[, and \111[ axes in the crystal coordinate system, where the traces of {111} slip planes and {110} planes are drawn as big black circles.…”