Secondary recrystallization of Goss texture in magnetostrictive Fe–Ga-based sheets
来源期刊：Rare Metals2020年第11期
论文作者：Chao Yuan Xue-Xu Gao Ji-Heng Li Xiao-Qian Bao
文章页码：1288 - 1294
摘 要：To avoid the unfavorable effect of precipitates on magnetic properties,low addition of 0.16 wt% NbC was employed in Fe82.5Ga17.5 alloy,and 0.27 mm sheets were successfully prepared by a rolling process.Strong Goss texture was obtained in Fe-Ga sheets by two-stage annealing process.The sulfur annealing in quartz ampoules was made to produce the preferred growth of Goss texture,with a 51 % increase in the observed saturation magnetostriction,from 87 × 10-6 in the Ar-annealed sheets to 132 × 10-6 in the S-annealed sheets.However,large amounts of S-rich and Nb-rich precipitates were formed in the S-annealed sheets.High-temperature annealing of the S-annealed sheets at 1,200℃ under a flow hydrogenargon atmosphere could effectively eliminate the precipitates and promote the selective growth of（110） grains due to the low surface energy.Large grains（～2 cm） of secondary recrystallization were achieved in the final annealed sheets,with the maximum average saturation magnetostriction of 180 × 10-6.
Chao Yuan，Xue-Xu Gao，Ji-Heng Li，Xiao-Qian Bao
State Key Laboratory of Advanced Metals and Materials,University of Science and Technology Beijing
摘 要：To avoid the unfavorable effect of precipitates on magnetic properties,low addition of 0.16 wt% NbC was employed in Fe82.5Ga17.5 alloy,and 0.27 mm sheets were successfully prepared by a rolling process.Strong Goss texture was obtained in Fe-Ga sheets by two-stage annealing process.The sulfur annealing in quartz ampoules was made to produce the preferred growth of Goss texture,with a 51 % increase in the observed saturation magnetostriction,from 87 × 10-6 in the Ar-annealed sheets to 132 × 10-6 in the S-annealed sheets.However,large amounts of S-rich and Nb-rich precipitates were formed in the S-annealed sheets.High-temperature annealing of the S-annealed sheets at 1,200℃ under a flow hydrogenargon atmosphere could effectively eliminate the precipitates and promote the selective growth of（110） grains due to the low surface energy.Large grains（～2 cm） of secondary recrystallization were achieved in the final annealed sheets,with the maximum average saturation magnetostriction of 180 × 10-6.
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