Investigation of secondary recrystallization kinetics in grain-oriented electrical steel using the ultrasonic interferometry

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  • Kenichi Sadahiro
    Technical Research Laboratories, Kawasaki Steel Corporation, 1-Kawasakidori, Mizushima, Kurashiki, Okayama 712-8511, Japan
  • Yasuyuki Hayakawa
    Technical Research Laboratories, Kawasaki Steel Corporation, 1-Kawasakidori, Mizushima, Kurashiki, Okayama 712-8511, Japan
  • Mitsumasa Kurosawa
    Technical Research Laboratories, Kawasaki Steel Corporation, 1-Kawasakidori, Mizushima, Kurashiki, Okayama 712-8511, Japan
  • Michiro Komatsubara
    Technical Research Laboratories, Kawasaki Steel Corporation, 1-Kawasakidori, Mizushima, Kurashiki, Okayama 712-8511, Japan

抄録

<jats:p>Measurements of the growth rate for the individual secondary recrystallized Goss grain in Fe–3%Si containing AlN and MnSe as grain growth inhibitors were made by the ultrasonic interferometry. It was found that the growth rates in the rolling direction for secondary recrystallized grains varied from 0.3 to 0.6 mm/min, and that the growth rate in the rolling direction is 1.2–1.9 times higher than that of the cross-rolling direction. The set of results were explained in terms of the concept of the “growth advantage” which is defined as the fraction of high-energy grain boundaries having the misorientation angles between 20° and 45° with respect to the specific secondary recrystallized grain in the primary recrystallized grains.</jats:p>

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