Microstructure-magnetic shielding development in additively manufactured Ni-Fe-Mo soft magnet alloy in the as fabricated and post-processed conditions
Microstructure-magnetic shielding development in additively manufactured Ni-Fe-Mo soft magnet alloy in the as fabricated and post-processed conditions
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DOI：
10.1016/j.jallcom.2021.161112
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发表时间：
2021-07-15
影响因子：
6.2
通讯作者：
Attallah, Moataz M.
中科院分区：
文献类型：
--
作者：
Mohamed, Abd El-Moez A.;Sheridan, R. S.;Attallah, Moataz M.
本研究对激光粉床熔融Ni-Fe-Mo合金的冶金特性与磁性能进行了深入的分析，以期为超灵敏量子系统制造出具有最大磁屏蔽性能的3D原型。在实施热处理(HT)和热等静压(HIP)后处理之前，研究通过控制显微组织密度、控制磁各向异性来优化磁性能的顺序计划。这也在考虑提供有效的机械性能。通过激光参数研究对样品的磁性能进行了优化，发现激光能量密度E=4.68J/mm(2)的样品具有最低的缺陷，获得了最好的软磁和机械性能。然而，由于该合金中平行于磁化硬轴<；100>；的(001)晶面取向，获得的磁性能仍然很差。研究发现，将制备的(AF)优化条件的晶体取向相对于构建方向倾斜45度和35度，可以改善软磁性能，因为这些角度分别对应于磁化<；110>；和<；111>；的易磁化轴，使得颗粒取向在相同的方向上。高温高压和热等静压后处理技术的应用进一步提高了材料的磁性能。在相同的优化条件下制作的中空管的磁屏蔽结果证实了块材的磁性能，达到了商业磁屏蔽的83%。(C)2021年爱思唯尔B.V.保留所有权利。
This study introduces a deep analysis, which correlates the metallurgical characters with the magnetic properties in laser powder bed fusion processed Ni-Fe-Mo, to produce 3D prototypes with maximum magnetic shielding performance for ultra-sensitive quantum-based systems. The study conducts a sequenced plan of optimising the magnetic properties via microstructure density control, controlling the magnetic anisotropy, before applying heat treatment (HT) and hot isostatic pressing (HIP) post-processes. This is also considering delivering effective mechanical properties. The magnetic properties optimisation was performed via laser parametric study, which found that the sample built with laser energy density E = 4.68 J/mm(2) achieves the best soft magnetic and mechanical results due to the lowest defects. However, the obtained magnetic properties are still poor, due to the (001) rich grain orientation, which parallels the hard axis of magnetisation < 100 > in this alloy. It was found that tilting the crystallographic orientation of the as fabricated (AF) optimised condition with 45 degrees and 35 degrees, with respect to the build direction, improves the soft magnetic properties, as these angles correspond to the easy axes of magnetisation < 110 > and < 111 > , respectively, allowing the grain orientation in the same directions. The magnetic properties are further promoted with HT and HIP post-processes application. The magnetic shielding results of hollow tubes, built with the same optimised condition, confirmed the magnetic behaviour of the bulk coupons, achieving 83% of the commercial magnetic shielding. (C) 2021 Elsevier B.V. All rights reserved.