Recrystallization mechanism involving < 110 > rotation in Fe-30Cr alloy single crystal

An Fe-30Cr single crystal sample was compressed along a [111] axis at room temperature. Slip bands on a {011} surface (front surface) were examined. A multiple-slip region was formed, where slips to three [111] directions wer e activated. Because of the predominant activation of a [111] slip which wa s parallel to the front surface, the multiple-slip region was rotated throu gh 40 degrees about the surface normal. After annealing, many recrystallize d grains were formed in the multiple-slip region and their orientations wer e examined at both front and back surfaces. The sample was then cut into ha lves to study recrystallization in the interior. The orientation of the maj ority of recrystallized grains formed at front and back surfaces was relate d to the orientation of the multiple-slip region by rotation about one of [ 110] axes. The number of recrystallized gains rotated about two specific [1 10] axes was much larger than that of recrystallized grains rotated about t he other [110] axes. The direction of rotation was singular for each observ ed surface and opposite to the initial relation of the multiple-slip region caused by compression. In the interior of the sample, similarly to recryst allization at free surfaces, many [110]-rotated grains were formed and the same singularity about the direction of rotation was also confirmed. Howeve r the predominance of recrystallized grains rotated about two specific [110 ] axes was not recognized in the interior of the sample. A simple dislocati on network model for the nucleation of recrystallized grains was applied to account for the characteristic recrystallization behavior.