Fe-Ga合金磁致伸缩性能和力学性能优化  

Optimization of magnetostrictive and mechanical properties of Fe-Ga alloys

作　　者：李花 温嘉慧 苏凌宇 李杨 王海青 蒋丽 LI Hua;WEN Jiahui;SU Lingyu;LI Yang;WANG Haiqing;JIANG Li(Department of Aerospace Science and Technology,Space Engineering University,Beijing 101407,China;School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]航天工程大学宇航科学与技术系,北京101407 [2]大连理工大学材料科学与工程学院,辽宁大连116024

出　　处：《大连理工大学学报》2025年第2期125-132,共8页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(52171151)。

摘　　要：通过第3元素添加,设计了Fe_(83-x)Co_(x)Ga_(17)(x=0,0.4,0.8)、Fe_(83)Al_(x)Ga_(17-x)(x=0,4,8)、(Fe_(83)Ga_(17))_(100-x)Y_(x)(x=0,0.4,0.8)合金,考察第3元素Co、Al、Y对合金磁致伸缩性能和力学性能的影响.实验结果表明,Co原子置换了体心立方结构中的部分Fe原子,与Fe-Ga基体合金形成置换固溶体,发生固溶强化,但是对合金磁致伸缩性能的提升并不明显;Al元素的添加对合金磁致伸缩性能的提升明显,其中Fe83Al8Ga9合金的饱和磁致伸缩应变为1.8×10^(-4),结合XRD物相分析,发现与A2相的增加有关.Y元素的添加使合金磁致伸缩性能恶化,当Y元素含量为0.4%时,磁致伸缩应变为0.8×10^(-4);当Y元素含量为0.8%时,磁致伸缩应变为0.4×10^(-4).对合金进行物相分析,发现其磁致伸缩应变的下降与有序相的生成有关.Fe_(82.6)Co_(0.4)Ga_(17)和(Fe_(83)Ga_(17))_(99.2)Y_(0.8)合金的硬度比Fe83Ga17合金的高10%左右,Fe_(83-x)Co_(x)Ga_(17)、Fe_(83)Al_(x)Ga_(17-x)、(Fe_(83)Ga_(17))_(100-x)Y_(x)合金均展示了优异的强度塑性组合,压缩屈服强度在500 MPa以上,压缩应变率在60%以上.Fe_(83-x)Co_(x)Ga_(17)(x=0,0.4,0.8),Fe_(83)Al_(x)Ga_(17-x)(x=0,4,8)and(Fe_(83)Ga_(17))_(100-x)Y_(x)(x=0,0.4,0.8)alloys are designed by the addition of the third element to investigate the effects of the third element Co,Al and Y on the magnetostrictive and mechanical properties of the alloys.The experimental results show that Co atoms replace some Fe atoms in the body-centred cubic structure,forming a displacement solid solution with Fe-Ga matrix alloys,resulting in solid solution strengthening.But the enhancement in the magnetostrictive properties of the alloy is not significant.The addition of Al element significantly enhances the magnetostrictive properties of the alloy,in which the saturation magnetostrictive strain of Fe_(83)Al_(8)Ga_(9) alloy is 1.8×10^(-4).Combined with XRD phase analysis,it is found that it is related to the increase of A2 phase.The addition of Y element deteriorates the magnetostrictive properties of the alloy.When Y element content is 0.4%,the magnetostrictive strain is 0.8×10^(-4),and when Y element content is 0.8%,the magnetostrictive strain is 0.4×10^(-4).Phase analysis of the alloy reveals that the decrease of the magnetostrictive strain is related to the generation of ordered phases.The hardnesses of Fe_(82.6)Co_(0.4)Ga_(17) and(Fe_(83)Ga_(17))_(99.2)Y_(0.8) alloys are about 10%higher than those of Fe_(83)Ga_(17) alloy,and Fe_(83-x)Co_(x)Ga_(17),Fe_(83)Al_(x)Ga_(17-x),(Fe_(83)Ga_(17))_(100-x)Y_(x) alloys all exhibit excellent strength-plasticity combinations,with compressive yield strengths above 500 MPa,and compressive strain ratios above 60%.

关 键 词：FE-GA合金 元素添加 磁致伸缩性能 力学性能 

分 类 号：TB34[一般工业技术—材料科学与工程]