High-temperature strength-coercivity balance in a FeCo-based soft magnetic alloy via magnetic nanoprecipitates

Kaisheng Ming ¹Shuimiao Jiang ²Xiaoyuan Niu ³Bo Li ²Xiaofang Bi ⁴Shijian Zheng⁵

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作者信息

1. State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin,300130,China;Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology,School of Materials Science and Engineering,Hebei University of Technology,Tianjin,300130,China;Key Laboratory of Aerospace Materials and Performance (Ministry of Education),School of Materials Science and Engineering,Beihang University,Beijing,100191,China
2. Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology,School of Materials Science and Engineering,Hebei University of Technology,Tianjin,300130,China
3. School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin,300130,China
4. Key Laboratory of Aerospace Materials and Performance (Ministry of Education),School of Materials Science and Engineering,Beihang University,Beijing,100191,China
5. State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin,300130,China;Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology,School of Materials Science and Engineering,Hebei University of Technology,Tianjin,300130,China
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Abstract

Precipitation strengthening is an effective approach to enhance the strength of soft magnetic alloys for applications at high temperatures,while inevitably results in deterioration in coercivity due to the pinning effect on the domain wall movement.Here,we realize a good combination of high-temperature strength and ductility (ultimate tensile strength of 564 MPa and elongation of ～ 20 ％,respectively) as well as low coercivity (6.97 Oe) of FeCo-2V-0.3Cr-0.2Mo soft magnetic alloy through introducing high-density magnetic nanoprecipitates.The magnetic nanoprecipitates are characterized by FeCo-based phase with disordered body-centered cubic structure,whichenables the alloy to have a low coercivity.In addition,these nanoprecipitates can impede the dislocation motion and suppress the brittle fracture,which lead to a high tensile strength and ductility.This work provides a guideline to enhance strength and ductility while maintaining low coercivity in soft magnetic alloys via magnetic nanoprecipitates.

Key words

FeCo-based soft magnetic alloys/Strength/Ductility/Coercivity/Magnetic nanoprecipitates

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基金项目

出版年

2021

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量34

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