日本金属学会誌

J. Japan Inst. Metals, Vol. 38, No. 10 (1974),
pp. 977-985

Deformation Behavior of Single Crystals of Copper during Rolling and Rolling Texture

Shozo Yoshioka1, Mitsuo Mera1 and Kenji Morii2

1College of Engineering, University of Osaka Prefecture, Sakai
2Graduate School, University of Osaka Prefecture, Sakai

Abstract:

The orientation dependence of the deformation behavior of single crystals of copper during rolling deformation has been investigated by rolling 80 crystals, each having a different initial orientation. The rolling textures of an imaginary polycrystal in which the effects of the constraints of each grain from grain boundaries and neighboring grains during deformation may be ignored (``pseudopolycrystal'') were derived from the orientations attained by rolling of numbers of single crystals.
The inhomogeneities of deformation and the courses of the orientation changes in the copper single crystals were surveyed by means of optical microscopy and reflection electron diffraction technique, respectively. The deformation behavior of the rolled crystals having initially the rolling plane normals in the stereographic triangle 100-101-111 could be grouped into the following three types, depending upon the rolling direction: (1) Inhomogeneous deformation, mainly arising on the crystals having the rolling directions in the vicinity of the [203]-[112] orientations in a stereographic projection, (2) Abnormal lattice-rotation, found around the rolling direction in the crystals having the rolling direction near the [111] orientation, (3) Homogeneous deformation, observed in the crystals with the orientations other than given above. These deformation behaviors were roughly explained in terms of the orientation dependence of the kinds and the characters of the active slip systems in single crystals during rolling.
The rolling textures of the ``pseudo-polycrystal'' at the reductions of 50 and 96% agreed, respectively, with the intermediate type- and pure metal type-textures which should develop in the polycrystalline copper rolled up to the corrsponding reductions. It is concluded from this fact that the contributions of grain boundaries and neighboring grains to the texture development in polycrystalline copper are not so pronounced as to alter the ideal orientations of the rolling texture.


(Received 1974/05/27)

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