抄録
The variation of the textures in 7–3 brass sheets rolled by 93% and then annealed at various temperatures has been studied by using the quantitative X-ray pole figures. The primary recrystallization is almost completed after annealing for 30 min at 300°C and the textures consist of the {225}⟨734⟩ major component and the {110}⟨110⟩ minor component. On annealing at a temperature higher than 600°C the grain growth occurs, giving rise to the texture with the double components, {110}⟨110⟩ and {110}⟨112⟩. The former is stronger at the early stage of annealing and with increasing time and temperature of annealing, the latter becomes stronger replacing the former,
24 rotation relationships between the growing grain and the matrix consumed are calculated for each case of the orientation changes by using a computer. The {225}⟨734⟩ major component after the primary recrystallization has three equivalent rotation relationships of ⟨111⟩ 30° with the deformed matrix. The {110}⟨112⟩ grains formed on the stage of the grain growth is considered to originate from the formation of the annealing twin of the {110}⟨110⟩ grains to grow rapidly at the expense of the {225}⟨734⟩ grains because of the favourable orientation relationship of ⟨111⟩ 30° and then to consume the {110}⟨110⟩ grains because of their large grain size. This type of variation of the texture during annealing is thought to occur in all fcc metals and alloys with the low energy of stacking fault.
