(α+β)黄銅材の引抜加工および再結晶集合組織の形成

抄録

The forming process of drawing texture and the recrystallization behavior of (α+β) brass rod have been investigated by means of determination of the ODF and transmission electron microscopy.
The preferred fiber component is composed of the ⟨111⟩+⟨100⟩ duplex fiber texture which is less in intensity than that of α mono-phase brass rod because of the presence of β-phase. The fiber component in β-phase is composed of the ⟨110⟩ fiber texture which is a stable orientation in bcc metals. The volume fraction of β-phase increases with the increase of the drawing ratio and reaches about 40% by drawing to 90% reduction, because the distorted β′-phase and fct α₁-phase are developed during deformation.
Regarding the recrystallization behavior, the ⟨111⟩ fiber texture remains in α-phase, and the ⟨110⟩ fiber texture remains in β-phase with the continuous recrystallization.
Microscopic examination shows that the α-phase bulges into the β-phase on annealing.