Relations between Initial and Final Orientations in Rolling and Annealing of Silicon Ferrite

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  • B. F. Decker
    General Electric Research Laboratory, Schenectady, New York
  • David Harker
    General Electric Research Laboratory, Schenectady, New York

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<jats:p>An investigation of the effects of rolling and annealing on the orientation of individual grains in silicon ferrite strip yielded results which led to the formulation of a theory for the appearance of the ``magnetic'' orientation in the final processed strip. It is proposed that, in a fine-grained strip of silicon ferrite, those grains which are already in the ``magnetic'' orientation before rolling will keep that mean orientation during rolling but become more highly strained than other grains, and therefore, they will become the portions of the cold-rolled strip with highest free energy. In the annealing process these highest energy regions will recrystallize first, becoming lowest energy regions which will be able to consume the now higher energy regions surrounding them. Since these nuclei have the ``magnetic'' orientation, the final product also attains the ``magnetic'' orientation.</jats:p>

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