INFLUENCE OF GRAIN ORIENTATION ON MAGNETIC AGING BEHAVIOR OF A NON-ORIENTED SILICON STEEL SHEET

The influence of grain orientation on magnetic aging behavior of a non-oriented silicon steel sheet was investigated. It was observed that the relative core loss increment went up with increasing {111} texture, as well as with more second-phase particles which precipitated dispersively during the aging treatment (200 degrees C for 24h) and created a pinning force against domain wall movement during magnetization. It was deduced that the magnetic driving force depends on grain orientation, that in which grains with < 100 > parallel to the magnetic field, is the most favorable texture component for reducing the core loss increment after aging. The magnetostrictive effect of the non-oriented silicon steel sheet may promote precipitation of second-phase particles. However, the sheet texture was not strong enough to induce notable diffences in magnetostriction among the observed samples.