Fe-Ga-Tb合金轧制薄带的织构与磁致伸缩性能  

Texture and magnetostrictive properties of Fe-Ga-Tb alloy rolled thin sheet

作　　者：都宏基 和正华 翟欣雅 郝宏波[2] 朱晓飞[3] 陈立佳[1] DU Hong-ji;HE Zheng-hua;ZHAI Xin-ya;HAO Hong-bo;ZHU Xiao-fei;CHEN Li-jia(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China;State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou 014030,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110870 [2]包头稀土研究院,白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头014030 [3]中国科学院金属研究所,辽宁沈阳110016

出　　处：《材料热处理学报》2022年第8期133-142,共10页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(52004164);内蒙古自然科学基金重点项目(2018ZD10);辽宁省教育厅项目(LQGD2020013)。

摘　　要：利用X射线衍射(XRD)、扫描电镜(SEM)与电子背散射衍射(EBSD)技术等研究了Fe-Ga-Tb合金薄带轧制与退火过程中的微结构、织构及磁致伸缩性能演变规律。结果表明:初次再结晶退火板的平均晶粒尺寸为15.5μm,再结晶织构由{111}<112>为峰值的强γ织构与弱Goss织构组成,尺寸为30~150 nm的碳化物与硫化物析出相在初次再结晶基体均匀分布,这种微结构与织构特征可为Goss织构发生异常长大提供有利条件。当退火温度升高至925℃时,再结晶基体晶粒尺寸仅为25μm,少量Goss晶粒异常长大至2.5 mm,退火温度达到1000℃时,Goss晶粒达到厘米尺寸,占据样品表面的98%,仅残留少量非Goss织构的岛状晶粒。高温退火过程中随着二次再结晶对Goss织构的强化,Fe-Ga-Tb合金薄带的磁致伸缩系数大幅提高,1000℃退火后磁致伸缩系数可达284×10^(-6)。Microstructure,texture and magnetostrictive properties of Fe-Ga-Tb alloy thin sheet during rolling and annealing were studied by means of X-ray diffraction(XRD),scanning electron microscopy(SEM)and electron backscatter diffraction(EBSD)technique.The results show that the average grain size of the primary recrystallized annealing sheet is 15.5μm,the recrystallization texture is composed of strongγtexture with peak at{111}<112>and weak Goss texture,carbide and sulfide precipitates with a size of 30-150 nm are evenly distributed in the primary recrystallized matrix,and this microstructure and texture feature can provide favorable conditions for the abnormal growth of Goss texture.When the annealing temperature rises to 925℃,the grain size of recrystallized matrix is only 25μm,and a small amount of Goss grains grow abnormally to 2.5 mm.When the annealing temperature reaches 1000℃,Goss grains reach cm scale,accounting for 98%of the sample surface,leaving only a small amount of island grains with non-Goss texture.During high-temperature annealing,with the strengthening of Goss texture by secondary recrystallization,the magnetostrictive coefficient of the Fe-Ga-Tb alloy thin sheet increases greatly,and the magnetostrictive coefficient can reach 284×10^(-6)after annealing at 1000℃.

关 键 词：FE-GA合金 轧制薄带 磁致伸缩材料 二次再结晶 织构 

分 类 号：TG142.7[一般工业技术—材料科学与工程]