D Vanderschueren

Application of a texture parameter model to study planar anisotropy of rolled steel sheets

A new model for texture characterization in steel sheets has recently been developed. The model makes use of 25 parameters defined in the orientation distribution function (ODF). Experimental textures consisting of the alpha and gamma fibres and/or the Goss and cube components can be reproduced. The model is briefly described. Then, it is shown how industrial steel sheet texture can be optimized with regard to planar anisotropy and formability. The latter study relies on the generation of a series of ODFs which have characteristic differences compared to the given experimental ODF. The r-value profiles are predicted for each of the generated textures using the Taylor theory.

THE EFFECT OF CROSS ROLLING ON TEXTURE AND MAGNETIC-PROPERTIES OF NONORIENTED ELECTRICAL STEELS.

The texture change due to a change of cold rolling direction and annealing temperature in the production of 0.6% Si steel sheet is described. Cross rolling results in a very strong (001) component, causing soft magnetic properties in a direction at 45 degrees of the rolling direction. The texture governing mechanism of the primary and secondary recrystallization was oriented growth. The influence of texture on magnetic properties could be shown by measuring the directional properties of the sheet. The correlation between hysteresis losses and induction with texture and grain size was quantified.

Influence of Cold Rolling Reduction and Cross Rolling on Recrystallization Texture Formation in Electro Deposited Pure Iron with a Sharp and Homogeneous //ND Fiber

The cold rolling and annealing texture formation has been investigated in electro deposited pure iron which has an extremely sharp and isotropic <111>//ND fiber. Regardless of cold rolling reduction, {111}<112> intensified texture is formed after cold rolling. Similar texture remains after recrystallization in 65% cold rolled material while {111}<110> type texture forms in 80% and 90% cold rolled ones. The recrystallized grains at the stage of 5% recrystallization have {111}<112> orientation in 65% cold rolled sheet, whereas {111}<110> is observed in 80% cold rolled one. From this aspect, it is considered that the nucleation orientation plays an important role in the recrystallization texture formation. In the meanwhile, the growth of the recrystallized nuclei is also supposed to affect the recrystallization texture formation. The nuclei with {111}<112> orientation in lightly cold rolled sheet are easier to consume the deformed matrix than they do in heavily cold rolled sheets because their frequency to encounter a deformed grain with nearly the same orientation is much smaller in lightly cold rolled specimen, which can result in a large mobility for growth. Cross cold rolling makes cold rolling texture rather homogeneous <111>//ND fiber, which gives rise to an almost homogeneous <111>//ND fiber after annealing.