Mechanical properties of stochastically cracked soft magnetic material

IF 4.2 Q2 ENGINEERING, MANUFACTURING
Alexander D. Goodall , Jared Uramowski , Chad W Sinclair , Lova Chechik , Iain Todd
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引用次数: 0

Abstract

Processing of soft magnetic materials with additive manufacturing has shown capability to deliver good magnetic properties and increased silicon content of Fe-6.5 wt%Si, however methods must be used to reduce the eddy currents in large bulk cross-sections in components created by additive manufacturing. Geometrical design has been shown to do this effectively, however stochastically cracked parts show similar magnetic performance with a large increase in stacking factor. To enable their use in electrical machines the mechanical properties of this material must be understood. Therefore, this study uses uniaxial tensile testing to understand the mechanical performance. The ultimate tensile strength of the material in the as-built condition was 17.9 MPa (σ = 4.5 MPa), which was improved by 40% to 25.5 MPa (σ = 5.7 MPa) by infiltrating the cracks with a low viscosity resin. This brings the material strength to more than three standard deviations from the required strength of 7 MPa to be used in a specific axial flux machine. The material exhibited an elongation to failure of 8-10%, showing that the suppression of ordered phases by high cooling rates has improved the ductility of the material. Hence, the stochastically cracked parts have sufficient properties to be used in the 3D magnetic circuits of electrical machines.

随机裂纹软磁材料的力学性能
采用增材制造对软磁材料进行加工已显示出提供良好磁性能和增加Fe-6.5wt%Si的硅含量的能力,然而,必须使用方法来减少增材制造产生的部件中大体积横截面中的涡电流。几何设计已被证明可以有效地做到这一点,但随机开裂的零件显示出类似的磁性性能,堆叠因子大幅增加。为了使其能够在电机中使用,必须了解这种材料的机械性能。因此,本研究采用单轴拉伸试验来了解其力学性能。在竣工条件下,材料的极限抗拉强度为17.9MPa(σ=4.5MPa),通过用低粘度树脂渗透裂缝,抗拉强度提高了40%,达到25.5MPa(σ=5.7MPa)。这使得材料强度与在特定轴向磁通机中使用的7MPa的要求强度相比达到三个以上的标准偏差。该材料表现出8-10%的断裂伸长率,表明高冷却速率对有序相的抑制提高了材料的延展性。因此,随机裂纹零件具有足够的性能,可用于电机的3D磁路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Additive manufacturing letters
Additive manufacturing letters Materials Science (General), Industrial and Manufacturing Engineering, Mechanics of Materials
CiteScore
3.70
自引率
0.00%
发文量
0
审稿时长
37 days
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