Evolution of {0kl} 〈1 0 0〉 texture and microstructure in preparation of ultra-thin grain-oriented silicon steel

Study on the recrystallization microstructure and texture evolution of a rolled 0.075 mm ultra-thin grain-oriented silicon steel

“…A predominant {hk0}<001> recrystallization texture can be observed in every sample. As discussed in our earlier work, when the rolled ultra-thin grain-oriented silicon steel is subjected to annealing, preferential {hk0}<001> nucleation occurs either inside shear bands or at in-grain deformation-induced boundaries, and the preferential {hk0}<001> nucleation leads to strong {hk0}<001> recrystallized texture [6]. In particular, when no marked advantageous grain growth occurs and the grain size is fairly uniform, as depicted in figure 2(a-b), the area fraction of {hk0}<001> grains are overwhelmingly high.…”

“…Similar to that in EBSD data, a fairly uniform fine microstructure is obtained after annealing for 10 min. To combine IPF ND and IPF RD grain maps, {110}<001>, {100}<001> orientation preference are observed in different regions, corresponding to respective recrystallization characteristic on different oriented deformed substrate [6]. The occurrence of γ-fiber grains suggests the existence of initial grain boundaries in raw material, in other words, figure 5(a) displays the recrystallized microstructure of initial two coarse grains.…”

“…The production of ultra-thin grain-oriented silicon steel usually applies cold rolling and annealing processes on commercial grain-oriented silicon steel sheets. Much of the researches, including our previous work, have examined the deformation and recrystallization behaviors of ultra-thin grainoriented silicon steel [4][5][6]. Considering the sharp Goss texture in raw material, it is suggested that the recrystallization mainly occurs on {111}<112> deformed matrix and develops strong {hk0}<001> recrystallization texture.…”

Effect of Recovery Annealing Prior to Recrystallization Annealing on the Texture Evolution of a 3.3% Silicon Steel

“…[13,30,33] Simultaneously, new grains with the aforementioned orientations nucleate and grow within the extended annealing time up to 60 min. In particular, the grains with the orientation of {021}<100> can consume small Goss grains, [34] which leads to the weakening of Goss texture as well as the strengthening of the {021}<100> orientation. Therefore, the observed phenomenon, namely, the favored nucleation and growth of λ-, {021}<100>-, and {332}<uvw>oriented grains, should be a combined effect of both the preferred nucleation and favored grain growth mechanisms.…”