Table of Contents
Textures and Microstructures
Volume 14 (1991)–18
http://dx.doi.org/10.1155/TSM.14-18.673

Nucleation During Primary Recrystallization of RGO Electrical Steel Sheet Observed by the EBSP-Method

1Thyssen Stahl AG, D-4100 Duisburg 11, Germany
2Institut für Metallkunde und Metallphysik der RWTH Aachen, Aachen D-5100, Germany
3SINTEF, Division of Metallurgy, Trondheim N-7034, Norway

Copyright © 1991 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

RGO electrical steel with low power losses and high permeability to be used in power transformers obtains its superior magnetic properties by a sharp Goss-texture developed by secondary recrystallization. RGO is produced by a two stage cold rolling process with intermediate annealing and subsequent primary recrystallization. By ODF analysis a high Goss intensity after primary recrystallization was empirically proved to be advantageous for the development of a sharp final Goss-texture in the following secondary recrystallization. This, in turn, requires a better understanding of how to achieve the beneficial primary Goss-texture formed by the basic processes of nucleation and growth. In the present study the early state of recrystallization was investigated. Only the EBSP-method (electron back scattering pattern), recently developed by Dingley, provides a sufficient submicron spatial resolution to measure the orientations of the early nuclei together with their cold worked and recovered environment.