LIN Kexin; YANG Weiming; LI Wenyu; MA Yan; MA Li; ZHANG Xiang; LIU Haishun

doi:10.7498/aps.74.20250559

Abstract

Fe-based amorphous alloys have exceptional properties such as low coercivity and core loss. In recent years, the development of amorphous alloys by using selective laser melting (SLM) technology has become the focus of attention. However, the glass-forming ability (GFA) and mechanical properties pose challenges for fabricating Fe-based amorphous alloys with complex geometries. This work aims to establish fundamental processing-(micro) structure-property links in Fe-based amorphous alloys processed by selective laser melting (SLM). With that purpose, a low-energy-input melt pool is achieved and the overlap quality between adjacent melt tracks and successive deposition layers is enhanced, through optimization of printing parameters. The Fe-based amorphous alloy is obtained with a high relative density of 94.3% and low coercivity of 0.5 Oe. Furthermore, the saturation magnetization of the printed alloy increases to 0.89 T compared with that of the powder feedstock. This work overcomes the mutual constraint between the GFA and part quality in fabricating of complex-structure Fe-based amorphous alloys, and is of great significance for promoting the application of Fe-based amorphous alloys.

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Corresponding author: YANG Weiming, wmyang@cumt.edu.cn

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 52171165).

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BMG Composition	Density /%	Amorphous fraction/%	M_s/ T	H_c/ Oe	Reference
Fe_68.3C_6.9Si_2.5B_6.7P_8.7Cr_2.3Mo_2.5Al_2.1	99.7	—	1.08	0.35	[40]
Fe₇₁Si₁₀B₁₁C₆Cr₂	94	90	1.3	4.98	[37]
Fe_73.7B₁₁Si₁₁Cr_2.3C₂	96	47	1.22	20.1	[26,32]
Fe₇₃Si₁₁B₁₁C₃Cr₂	98	70	1.29	6.4	[16]
Fe_73.7B₁₁Si₁₁Cr_2.3C₂	74	46	1.19	35.06	[41]
Powder (Fe₇₀W₉Mo₃Cr₅Ni₃Si₄B₄CMn)	—	100	0.84	2	This work
Bulk (160 W/2600 mm/s /95 μm/15 μm)	79.1	98.1	0.89	0.7	This work
Bulk (160 W/2600 mm/s /65 μm /15 μm)	94.3	100	0.88	0.5	This work

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Vol. 74, Issue 16 - 2025-08-20

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