Abstract
The stability against the rolling deformation of the {101}⟨\bar121⟩ orientation which is one of ideal orientations of the rolling textures for fcc metals has been studied through rolling the (101)[\bar121] copper single crystals varying the rolling rates and the references for the rolling direction. The active slip systems and the orientation changes were analyzed by the slip line observation using replica techniques and shape change measurements and by the reflection electron diffraction method, respectively.
In the rolling referred to TD (RD⊥TD reference line), the lattice rotation from (101)[\bar121] to \simeq(211)[\bar111] via \simeq(101)[\bar111] took place independently of the rolling rates. This may be related to the shear deformation in the rolling plane and the stability of the (101)[\bar111] orientation around the rolling direction.
On the other hand, in the rolling referred to LD (RD\varparallelLD reference line), it was found that the (101)[\bar121] orientation is stabilized at a high strain rate rolling (102/sec), but accompanied by the large orientational fluctuation around the rolling direction at a low strain rate rolling (10−1/sec). The main active slip systems were of about the same kind in both strain rates. It may be inferred from these results that the stabilization of the (101)[\bar121] orientation is due to the self-correcting feature of the active slip systems and the fluctuation is concerned with the dislocation structures (cell and substructure) formed during the deformation under high thermal activation.
