Enhancing soft-magnetic performance of Fe50Ni26Co20Cr4 medium-entropy alloys through microstructure engineering in laser powder bed fusion

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2025-05-01 DOI:10.1016/j.scriptamat.2025.116736

Pengcheng Zhang, Lixue Liu, Ruyi Huang, Bailing An, Cheng Zhang, Lin Liu

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Abstract

Additive manufacturing (AM) enables direct production of complex geometries from 3D model data, presenting new opportunities for fabricating specialized motor components using soft magnetic alloys. However, AM-processed soft magnetic alloys often encounter three limitations: poor printability, increased coercivity, and low electrical resistivity. In this work, we developed a novel Fe₅₀Ni₂₆Co₂₀Cr₄ medium entropy alloy (MEA) using laser powder bed fusion (LPBF). The alloy demonstrates excellent printability, and enhanced magnetic properties after optimal annealing (i.e., a saturation flux density of 1.55 T, and low coercivity of 124.9 A/m), together with an electrical resistivity up to 70 μΩ cm. The superior magnetic properties originate from a unique microstructure containing coarse-grained FCC phase with absence of precipitates. The findings of this study offer valuable insights into advancing soft-magnetic MEA alloys through the AM process.

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激光粉末床熔合中熵Fe50Ni26Co20Cr4合金的微结构工程增强软磁性能

增材制造（AM）能够从3D模型数据中直接生产复杂的几何形状，为使用软磁合金制造专用电机部件提供了新的机会。然而，am加工的软磁合金经常遇到三个限制：印刷性差、矫顽力增加和电阻率低。本文采用激光粉末床熔合法制备了Fe50Ni26Co20Cr4中熵合金（MEA）。该合金具有优异的可印刷性，经最佳退火后的磁性能增强（即饱和磁通密度为1.55 T，矫顽力低至124.9 a /m），电阻率高达70 μΩ cm。优异的磁性能源于其独特的微观结构，包含粗晶FCC相，无析出物。本研究的发现为通过AM工艺推进软磁MEA合金提供了有价值的见解。

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

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.