Effect of heat treatment on microstructure evolution and magnetic properties of Ni-15Fe-Mo permalloy prepared by selective laser melting

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL Journal of Alloys and Compounds Pub Date : 2025-04-23 DOI:10.1016/j.jallcom.2025.180558

Shaohe Zheng, Mingwei Wei, Shanlin Wang, Timing Zhang, Jilin Xie, Kang Wei, Min Zheng, Yuhua Chen

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Abstract

Ni-15Fe-Mo permalloy with a density of 99.75 % was fabricated using selective laser melting (SLM) technology. The effects of process parameters and recrystallization annealing heat treatment on the microstructure, mechanical properties, and soft magnetic properties of the permalloy specimens were examined, and the correlation between microstructure evolution and properties was clarified. Microstructural changes induced by recrystallization annealing led to increased saturation magnetic induction and reduced coercivity. The enhancement of soft magnetic characteristics can be ascribed to reduced internal stresses, cellular substructural wall impediments, magnetic domain restrictions, and compositional heterogeneity. The annealing process led to a minor reduction in microhardness and tensile strength and a substantial increase in elongation. This study provides an essential technical reference for fabricating permalloy soft magnetic materials with excellent comprehensive performance using SLM technology.

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热处理对选择性激光熔化制备Ni-15Fe-Mo坡莫合金组织演变和磁性能的影响

采用选择性激光熔化（SLM）技术制备了密度为99.75%的Ni-15Fe-Mo坡莫合金。研究了工艺参数和再结晶退火热处理对坡莫合金试样组织、力学性能和软磁性能的影响，明确了组织演变与性能之间的关系。再结晶退火引起的显微组织变化导致饱和磁感应强度增加和矫顽力降低。软磁特性的增强可归因于内应力的减小、细胞亚结构壁的阻碍、磁畴的限制和成分的非均质性。退火过程导致显微硬度和抗拉强度的轻微降低和伸长率的大幅增加。该研究为利用SLM技术制备综合性能优异的坡莫合金软磁材料提供了必要的技术参考。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.