Temperature dependence of abnormal grain growth and high magnetostriction in Goss-oriented Fe-Al thin sheets

摘要: In this paper, we investigate grain growth behaviors in Fe-Al-NbC rolled sheets annealed under a sulfur atmosphere at temperatures of 1000–1300 °C for NbC additions 0.75%, 1.0%, and 1.5%. Fe80Al20 sheet plus 0.75% NbC, abnormal (AGG) occurred higher temperature than 1150 °C. Large single (011) grains that covered 74%–90% sample surface were fully grown 1200–1300 °C. For these samples, the remaining 10%–26% was comprised small isolated island-like dispersed throughout Goss matrix. The single-grain-oriented Fe-Al 1250 °C 5 h exhibited magnetostriction 133 ppm along rolling direction (RD). A maximum value 143 ppm RD obtained samples 1200 °C 24 h. Of particular interest is response ⟨100⟩ shows 177 ppm, approaching ∼94.4% magnetostrictive performance crystal 19...