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To systematically investigate the magnetic anisotropy of NiFeMo alloy fabricated via Selective Laser Melting (SLM) and to elucidate the role of metallurgical structure on its magnetic performance, soft magnetic NiFeMo alloy specimens were synthesized under a variety of conditions, including varying substrate preheating temperatures, laser scanning strategies, and tilting angles. The microstructural and magnetic characterizations were conducted using a suite of analytical techniques: optical microscopy (OM), microhardness testing, X-ray diffraction (XRD), scanning electron microscopy (SEM), and electron backscatter diffraction (EBSD). The magnetization curves and soft magnetic parameters were derived utilizing a DC measuring instrument. Our findings reveal that the NiFeMo alloy is predominantly composed of the γ-(Ni, Fe) phase, with grain size, boundary, and orientation playing pivotal roles in determining its magnetic performance. At a substrate preheating temperature of 160°C, employing an island rotation strategy of 67° in conjunction with a 30° tilt angle for the fabrication of NiFeMo alloy specimens, optimal soft magnetic performance was achieved. This enhancement in performance is credited to the reduced temperature gradient and cooling rate facilitated by substrate preheating, coupled with the < 111 > grain orientation induced by the 30° tilt angle. Furthermore, the increase in large-angle grain boundaries, a consequence of substrate preheating, diminishes the resistance to domain wall motion, thereby further enhancing the soft magnetic characteristics of the specimens. The coercivity (Hc) of these specimens was measured at 27.5 A/m, which is notably lower than that of conventional processes (390.13 A/m) and post-annealing processes following Selective Laser Melting (SLM) (79 A/m). Concurrently, the initial magnetic permeability (μi) of the specimens reached 1.485 mH/m. © 2025 Elsevier B.V.
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Journal of Alloys and Compounds
ISSN: 0925-8388
Year: 2025
Volume: 1018
6 . 2 0 0
JCR@2022
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 5
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