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Vol.30, No.1, 90 ~ 98, 1992

Title

Development of Microstructure and Texture in Cross Rolled deep Drawing Steels

허무영Moo Young Huh, 김주한Joo Han Kim, 홍종휘Jong Hwi Hong

Abstract

The effect of texture and dislocation structure change on deformation behaviors in a corss-rolled steel was studied by texture measurements and TEM obsevations. The cross rolling experiment was performed through 60 or 90?rotation from the initial rolling direction. The reduction degree of the initial rolling was 30% and that of the final rolling was up to 80% The orientation change was calculated by Taylor`s deformation theory to analyze the development of the preferred orientations in the rolling texture. A rotation of microbands into the rolling direction in the longitudinal section was found by the cross rolling, while microbands became parallel to the rolling plane during the normal rolling deformation. Though shear band was not shown in the normal rolled specimen at 80% reduction, it formed in the cross rolled specimens at reductions higher than 70%. The rotation of the rolling direction at 30% reduction resulted in the corresponding rotation of the preferred orientations in the rolling texture. A marked change was shown in the texture of the corss rolled specimens of 50 % total reductions. Irrespective of cross rolling angles, the rolling texture of 80% total reduction could be described by a {111}//ND and a $lt;110$gt;//RD fiber.

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