The Possibility of Obtaining Electrical Steel with Texture {100} <001>

We have investigated the cold rolling mesostructure and recrystallization of BCC crystals {110} <110> Fe-3%Si using a method of orientation microscopy. The 40% deformation caused shear bands with habit plane at a slope of ~20 ... 28° to the direction of rolling to form a "fishbone"-type structure. The orientation of the crystal lattice in SBs was close to {100} <001>. It can be represented as a rotation around TD close to the crystallographic direction [001] at an angle of ~ ± 37°. Such disorientation corresponds to the special disorientation CSL Σ5 (36.87о, axis [001]) between SBs and the matrix. Primary recrystallization centers in previously deformed crystal {110} <110> are formed primarily in SBs. Their orientation appears to be close to the orientation {100} <001>. It has been shown that the usage of patterns of texture formation in the shear bands of original crystallites {110} <110> allows to obtain electrical steel with a cubic texture {100} <001>.

Determining the orientation of parent β grain from one α variant in titanium alloys

The relationship between the crystallographic orientation and habit plane normal of transformed α laths in titanium alloys is discussed according to the Burgers orientation relationship and the three-dimensional structure of the α lath. A new method (orientation–trace method) is developed to determine the orientation of the parent β phase using the orientation of the α lath, which was measured by electron backscatter diffraction, and the microstructural morphology of that α variant. This approach is validated in a near-α titanium alloy. Moreover, the habit plane normal direction of the transformed α lath can be obtained from the crystallographic orientations of the α lath itself and its parent β grain. The verification and the corresponding discussion show the reliability of this approach.