Effect of the thickness of each layer on textures of Cu/18Cr-8Ni-Fe clad metal

We have advanced the research of the texture control to improve the drawing formability of clad metals that are used as the anode cases of button type batteries. In this study, the effect of the thickness of each layer on the texture formation of the Cu/18Cr-8Ni-Fe clad metals was investigated by using specimens with different Cu bonding ratios ranging from 11 to 33%. A shear type rolling texture described as the < 110 >//RD fiber from {001}< 110 > to {111}< 110 > forms to the Cu surface but the beta fiber is little observed. The former texture especially develops after cold rolling the clad metal with a thinner Cu layer that was roll-bonded using the annealed Cu as a starting material. In the case of a thicker Cu layered specimen, the beta fiber forms in the center of the Cu layer. A sharp cube texture of the Cu layer formed in the annealed state remains even after cold rolling to high reduction for the thinner Cu layer. On the other hand, there is no difference of the texture formation corresponding to the clad ratio for the 18Cr-8Ni-Fe layer in contrast to the Cu layer, while the texture evolution of the 18Cr-8Ni-Fe layer is suppressed by the effect of the Cu layer.