3D printing of ductile equiatomic Fe-Co alloy for soft magnetic applications

The equiatomic Fe-Co alloy is an ideal soft magnetic material due to the combination of high saturation magnetization, permeability and low coercivity it offers. The ordered B2 phase in it, however, makes it highly brittle and hence unsuitable for industrial-scale manufacturing of bulk soft magnets....

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Main Authors: Li, Shihao, Lau, Kwang Boon, Wuu, Delvin, Wei, Fengxia, Lin, Ming, Cheong, Augustine, Wang, Pei, Tan, Cheng Cheh, Ramamurty, Upadrasta
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/159867
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1598672022-07-05T01:22:35Z 3D printing of ductile equiatomic Fe-Co alloy for soft magnetic applications Li, Shihao Lau, Kwang Boon Wuu, Delvin Wei, Fengxia Lin, Ming Cheong, Augustine Wang, Pei Tan, Cheng Cheh Ramamurty, Upadrasta School of Mechanical and Aerospace Engineering Institute of Materials Research and Engineering, A*STAR Engineering::Mechanical engineering Fe-Co Alloys Laser Powder Bed Fusion The equiatomic Fe-Co alloy is an ideal soft magnetic material due to the combination of high saturation magnetization, permeability and low coercivity it offers. The ordered B2 phase in it, however, makes it highly brittle and hence unsuitable for industrial-scale manufacturing of bulk soft magnets. In this work, we employ the laser powder bed fusion (LPBF) technique—a widely used one for additive manufacturing of metallic parts—to fabricate bulk equiatomic Fe-Co blocks with a microstructure that almost-exclusively contains the disordered body centered cubic (BCC) phase. It plus the high dislocation density (an inherent attribute of the LPBF technique) impart considerable ductility to the as printed alloy, which will make it highly amenable for post-processing mechanical operations such as machining. Subsequent annealing heat treatment (HT) will facilitate disordered BCC to ordered B2 phase transformation and reduction in dislocation density and residual stresses, all of which will maximize the soft magnetic properties. This study demonstrates a viable method to manufacture equiatomic Fe-Co parts with desired geometry and magnetic properties. Agency for Science, Technology and Research (A*STAR) This work was supported by the Structural Metals and Alloys Programme (Grant reference No.: A18b1B0061) of the Agency for Science, Technology and Research of Singapore 2022-07-05T01:22:34Z 2022-07-05T01:22:34Z 2021 Journal Article Li, S., Lau, K. B., Wuu, D., Wei, F., Lin, M., Cheong, A., Wang, P., Tan, C. C. & Ramamurty, U. (2021). 3D printing of ductile equiatomic Fe-Co alloy for soft magnetic applications. Additive Manufacturing, 47, 102291-. https://dx.doi.org/10.1016/j.addma.2021.102291 2214-7810 https://hdl.handle.net/10356/159867 10.1016/j.addma.2021.102291 2-s2.0-85115258822 47 102291 en A18b1B0061 Additive Manufacturing © 2021 Elsevier B.V. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Mechanical engineering
Fe-Co Alloys
Laser Powder Bed Fusion
spellingShingle Engineering::Mechanical engineering
Fe-Co Alloys
Laser Powder Bed Fusion
Li, Shihao
Lau, Kwang Boon
Wuu, Delvin
Wei, Fengxia
Lin, Ming
Cheong, Augustine
Wang, Pei
Tan, Cheng Cheh
Ramamurty, Upadrasta
3D printing of ductile equiatomic Fe-Co alloy for soft magnetic applications
description The equiatomic Fe-Co alloy is an ideal soft magnetic material due to the combination of high saturation magnetization, permeability and low coercivity it offers. The ordered B2 phase in it, however, makes it highly brittle and hence unsuitable for industrial-scale manufacturing of bulk soft magnets. In this work, we employ the laser powder bed fusion (LPBF) technique—a widely used one for additive manufacturing of metallic parts—to fabricate bulk equiatomic Fe-Co blocks with a microstructure that almost-exclusively contains the disordered body centered cubic (BCC) phase. It plus the high dislocation density (an inherent attribute of the LPBF technique) impart considerable ductility to the as printed alloy, which will make it highly amenable for post-processing mechanical operations such as machining. Subsequent annealing heat treatment (HT) will facilitate disordered BCC to ordered B2 phase transformation and reduction in dislocation density and residual stresses, all of which will maximize the soft magnetic properties. This study demonstrates a viable method to manufacture equiatomic Fe-Co parts with desired geometry and magnetic properties.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Li, Shihao
Lau, Kwang Boon
Wuu, Delvin
Wei, Fengxia
Lin, Ming
Cheong, Augustine
Wang, Pei
Tan, Cheng Cheh
Ramamurty, Upadrasta
format Article
author Li, Shihao
Lau, Kwang Boon
Wuu, Delvin
Wei, Fengxia
Lin, Ming
Cheong, Augustine
Wang, Pei
Tan, Cheng Cheh
Ramamurty, Upadrasta
author_sort Li, Shihao
title 3D printing of ductile equiatomic Fe-Co alloy for soft magnetic applications
title_short 3D printing of ductile equiatomic Fe-Co alloy for soft magnetic applications
title_full 3D printing of ductile equiatomic Fe-Co alloy for soft magnetic applications
title_fullStr 3D printing of ductile equiatomic Fe-Co alloy for soft magnetic applications
title_full_unstemmed 3D printing of ductile equiatomic Fe-Co alloy for soft magnetic applications
title_sort 3d printing of ductile equiatomic fe-co alloy for soft magnetic applications
publishDate 2022
url https://hdl.handle.net/10356/159867
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