Influence of annealing on enhancing soft magnetic properties in laser powder bed fusion processed Hiperco (Fe-49Co-2V)

IF 4.2 Q2 ENGINEERING, MANUFACTURING Additive manufacturing letters Pub Date : 2024-04-01 DOI:10.1016/j.addlet.2024.100208

S.M. Varahabhatla , V. Chaudhary , Abhishek Sharma , S.A. Mantri , S.S. Joshi , R.V. Ramanujan , Narendra B. Dahotre , R. Banerjee

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Abstract

Annealing of laser powder bed fusion (LPBF) processed Fe-49Co-2 V (Hiperco) samples at 865 °C for 4 h leads to a substantial improvement in its soft magnetic properties. While the as built LPBF samples exhibited relatively higher coercivities (H_c) ranging from 25.8 – 26.5 Oe, the annealed LPBF samples showed significantly lower coercivities (H_c) of 6.9 – 10.8 Oe. These lower H_c values can not only be attributed to the 15–20 times larger grain sizes, but also the higher degree of B2 ordering in the annealed condition. The enhanced degree of B2 ordering also increases the saturation magnetization (M_s), from 213 to 228 emu/g, in samples processed with a laser fluence (energy/density) of 3.4 J/mm². These results reveal the underlying mechanisms leading to an enhancement of soft magnetic properties in LPBF processed Hiperco via annealing-induced microstructural control.

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退火对提高激光粉末床熔融加工 Hiperco（Fe-49Co-2V）软磁特性的影响

将激光粉末床熔融（LPBF）加工的 Fe-49Co-2 V (Hiperco) 样品在 865 °C 下退火 4 小时，可显著改善其软磁特性。制成的 LPBF 样品表现出相对较高的矫顽力（Hc），介于 25.8 - 26.5 Oe 之间，而退火的 LPBF 样品则表现出明显较低的矫顽力（Hc），介于 6.9 - 10.8 Oe 之间。这些较低的 Hc 值不仅可归因于晶粒尺寸增大了 15-20 倍，还可归因于退火条件下较高的 B2 有序化程度。在使用 3.4 J/mm2 激光通量（能量/密度）处理的样品中，B2 有序化程度的提高也增加了饱和磁化（Ms），从 213 到 228 emu/g。这些结果揭示了通过退火诱导的微结构控制提高 LPBF 加工 Hiperco 软磁特性的基本机制。

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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