Toshiya Wada1, Katsuro Kuroki1 and Jirou Harase1
1Process Technology R & D Center, Nippon Steel Corp., Kitakyushu
Single crystals of 3%Si-Fe alloy have been used for a study of the formation of rolling and annealing textures. It is known that when a 3%Si-Fe (110) single crystal is cold rolled, (110) decreases and the crystal rotation towards (111) occurs, and upon annealing after 70% cold reduction it recrystallizes back to its original (110) orientation.
The present insestigation aimed at clarifying the relationship between the residual (110) component in the deformed texture and the recrystallized (110) texture through microscopic observation, X-ray stress measurement, hardness measurement and electron microscopic observation.
The (110) component is preserved as a minor component between deformation bands rotated towards a (111)[11 ] orientation. The hardness and stress measured by X-ray are always larger in the (110) component than in the components rotated towards (111)[11 ]. On annealing, the (110) component is shown to recover earlier than the rotated components in the 70% deformed crystal. However, under 60% deformation, the (110) component is slower in recovery than rotated components.
Recrystalized grains appeared at or contiguous to the boundaries of deformation bands where (110) seems to have been preserved. From these facts, it is concluded that the most strained component, namely the (110) component, in the deformed texture leads to the (110) recrystallized texture in the 70% cold-rolled (110) single crystal.
Please do not copy without permission.