Selective Laser Melting of a High-Strength, Miniature, Soft Magnetic Device with Complex Geometry

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2024-10-24 DOI:10.1007/s12540-024-01827-1

Zhiqiang Xue, Weiming Yang, Yan Ma, Meng Fang, Xiang Zhang, Haishun Liu, Yucheng Zhao

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引用次数: 0

Abstract

Micro-unmanned aerial vehicles (UAVs) are developing rapidly in many fields, demanding their motors to meet various requirements, such as being lightweight and efficient. Additionally, the motor components must also have high strength to avoid quality problems. Conventional methods are insufficient to satisfy the manufacturing of micromotor components, so additive manufacturing is employed. This paper fabricated a series of Fe-80%Ni micromotor cores using selective laser melting (SLM) and investigated the effects of annealing on their microstructures, magnetic properties, and mechanical performance. The samples exhibited a single face-centered-cubic FeNi₃ phase before and after annealing. The grains were uniformly distributed and corresponded to the size of the raw powders. The fine grains, along with residual stress, resulted in a considerably high yield strength of the as-printed SLM samples with a tensile yield strength of 690 MPa. Subsequent annealing of the SLM samples released the residual stress, enhancing the magnetic properties, with a saturation magnetization of 115 emu/g and an increase in the effective magnetic permeability to 214. The excellent combined mechanical and magnetic performances of the annealed SLM samples demonstrate the capability of SLM to enhance their properties while fabricating miniature complex-shaped magnetic devices, laying the foundation for the additive manufacturing of micro-UAVs motors.

Graphical Abstract

查看原文本刊更多论文

具有复杂几何形状的高强度、微型软磁器件的选择性激光熔化

微型无人机在许多领域发展迅速，对其电机提出了轻量化、高效化等要求。此外，电机部件也必须具有高强度，以避免质量问题。传统的方法无法满足微电机部件的制造要求，因此采用了增材制造。采用选择性激光熔化（SLM）法制备了一系列Fe-80%Ni微电机铁芯，研究了退火对其显微组织、磁性能和力学性能的影响。样品在退火前后均呈现单面心立方FeNi3相。颗粒分布均匀，与原料粉的粒度一致。细小的晶粒和残余应力使得打印的SLM样品具有相当高的屈服强度，其抗拉屈服强度达到690 MPa。随后对SLM样品进行退火处理，释放残余应力，增强磁性能，饱和磁化强度达到115 emu/g，有效磁导率提高到214。退火后的SLM样品具有优异的力学和磁性综合性能，证明了SLM在制造微型复杂形状磁性器件时具有增强性能的能力，为微型无人机电机的增材制造奠定了基础。图形抽象

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.