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Vol.29, No.3, 229 ~ 238, 1991

Title

Development of Fiber Type Preferred orientations in Cold rolled Deep Drawing Steel

김주한Joo Han Kim, 허무영Moo Young Huh, 홍종휘Jong Hwi Hong

Abstract

The development of the {111}//ND and the $lt;110$gt;//RD fiber in the texture of a cold rolled deep drawing steel was studied by the x -ray orientation distribution function measurements and TEM observations. The rolling texture was simulated with the Taylor and its relaxed strain models to explain the variation of preferred orientations under different boundary conditions. The formation of the preferred orientation {001}$lt;110$gt; in the hot coil was caused by the fcc stable orientation {110}$lt;112$gt; formed in austenite phase during the hot rolling. At a low reduction the boundaries of microbands were parallel to the trace of {110} slip planes. Though {11 11 8} $lt;4 4 11$gt; was only stable orientation under the Taylor condition, the orientation near {111}$lt;112$gt; was found in the rolling texture which is rotated 8°from {11 11 8}$lt;4 4 11$gt;. {111}$lt;112$gt; was calculated exclusively under the boundary condtions which involve the relaxation of δ_(ε13). Also, if the boundary conditions which involve the relaxation of δ_ε23, the orientation along the $lt;110$gt;//RD fiber was found. However the orientations along the {111}//ND fiber were formed under the various bounday conditions.

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