Al元素添加对(Fe73Ga27)99.8Tb0.2合金微观结构、磁性能及力学性能的影响
Effect of Al Addition on Microstructure,Magnetic Proper-ties,and Mechanical Properties of (Fe73Ga27)99.8Tb0.2 Alloy
杜金超 1李小飞 2焦佩英 2张志广 2龚沛2
作者信息
- 1. 内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特 010051;钢铁研究总院功能材料研究所,北京 100081
- 2. 内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特 010051
- 折叠
摘要
通过真空电弧炉制备(Fe73Ga27-xAlx)99.8Tb0.2(x=0,1,2,3,4,5)合金,研究Al添加对合金的微观结构、磁性能和力学性能的影响.结果显示,合金的相结构仍为A2相和Tb2Fe17相,其金相组织由胞状晶和柱状树枝晶组织组成.合金的晶格常数降低、(100)取向性增强以及晶界处的Tb2Fe17相对磁致伸缩性能有显著影响.合金的断口形貌为沿晶脆性断裂和解理断裂,产生断裂的原因包括Tb和Al元素偏析.(Fe73Ga24Al3)99.8Tb0.2合金的平行磁致伸缩应变(λ//)最高达到1.04×10-4.值得注意的是,相比于(Fe73Ga27)99.8Tb0.2合金,(Fe73Ga26Al1)99.8Tb0.2合金的λ//提高了 18.3％,伸长率提高了 53.4％,并且(Fe73Ga26Al1)99.8Tb0.2合金兼具高饱和磁化强度(Ms)、低剩余磁化强度(Mr)和矫顽力(Hc)等特性,在实际生产中可以降低生产成本,但该合金的抗拉伸强度和维氏硬度有所下降.因此,研究Al元素添加对Fe-Ga合金的微观机理对开发Fe-Ga合金器件具有重要意义.
Abstract
(Fe73Ga27-xAlx)99.8Tb0.2(x=0,1,2,3,4,5)alloys were prepared by vacuum arc furnace to investigate the effect of Al addition on the microstructure,magnetic properties,and mechanical properties of alloys.Results show that the phase structure of the alloys is still A2 phase and Tb2Fe17 phase,and the metallographic structure is composed of cellular crystal and columnar dendrite.The decrease in lattice constant,the intensification of(100)orientation,and the generation of Tb2Fe17 phase at the grain boundary exert significant effect on the magnetostrictive properties.The fracture morphology of the alloys is intergranular brittle fracture and cleavage fracture,and the causes of fracture occurrence include the segregation of Tb and Al elements.The parallel magnetostrictive strain(λ//)of(Fe73Ga24Al3)99.8Tb0.2 alloy peaks at 1.04×10-4.It is worth noting that compared with those of(Fe73Ga27)99.8Tb0.2 alloy,the λ//and elongation of(Fe73Ga26Al1)99.8Tb0.2 alloy increase by 18.3％and 53.4％,respectively.Besides,(Fe73Ga26Al1)99.8Tb0.2 alloy possesses the characteristics of high saturation magnetization(Ms),low remanent magnetization(Mr),and coercivity(Hc),which is beneficial to reduce the cost in actual production,but its tensile strength and Vickers hardness decrease to a certain extent.Therefore,the investigation on the micro-mechanism of Al addition on Fe-Ga alloys is of great significance for the development of Fe-Ga alloy devices.
关键词
(Fe73Ga27)99.8Tb0.2合金/Al掺杂/微观结构/磁性能/力学性能Key words
(Fe73Ga27)99.8Tb0.2 alloy/Al doping/microstructure/magnetic properties/mechanical properties引用本文复制引用
基金项目
Inner Mongolia Autonomous Region Science and Technology Plan Project(2020GG0284)
出版年
2024
NETL
NSTL
万方数据