Fe-Ga-B合金室温塑性及轧制材料磁致伸缩性能

Mechanical property of Fe-Ga-B alloy and magnetostriction of rolled sheets

研究了0.5%(原子分数)B对Fe83Ga17合金室温力学性能的影响及(Fe81Ga19)99.5B0.5轧制薄片磁致伸缩性能。结果表明,少量B添加提高了Fe-Ga合金的室温塑性,实现(Fe81Ga19)99.5B0.5合金的轧制成形。热处理对(Fe81Ga19)99.5B0.5合金薄片材料磁致伸缩性能有很大影响。在同一热处理制度条件下,磁致伸缩性能随变形量的增加而减小;对于变形量为93.5%的样品,同一热处理时间,样品磁致伸缩性能随热处理温度的升高而增加,同一热处理温度时,样品磁致伸缩性能都表现出先升高后降低的变化趋势,样品在1300℃保温2h后,磁致伸缩性能最好,达到1.65×10-4。热处理对(Fe81Ga19)99.5B0.5合金薄片材料磁致伸缩性能的影响归因于对样品织构的影响。具有{100}〈012〉织构样品的磁致伸缩性能最高,而{111}〈110〉和{111}〈112〉织构对应的磁致伸缩性能较低。

The small addition of B can improve room temperature ductility of Fe-Ga alloy. The （Fe81 Ga19）99.5 B0.5 sheets with thickness of 0.13-0. 33mm were prepared by conventional hot rolling and cold rolling and the magnetostriction property were investigated. It was found that under the same thermal history, the magnetostriction of （Fe81 Ga19）99.5 B0.5 sheets increased with the decrease of deformation amount. The sheets with deformation of 93.5% have the peak magnetostrictive value of 1.29 × 10^-4 , 1.36 × 10^-4 and 1.65 × 10^-4 obtained at annealing condition of 1100,1200 and 1300℃ for 2h, respectively. The broad convex profiles with peak magnetostrictive values of 1.30 × 10^-4 and 1.00× 10^-4 were observed in the annealed sheets with deformation of 95. 9% and 97.5%, respectively. Magnetostriction of the sheet are closely related to the recrystallization texture depends on heat treatment process. The magnetostriction of sheets with { 100} （012） texture was higher that that of sheets with {111}（110） or {111} （112） texture.