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

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

doi:10.1016/j.addlet.2024.100208

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

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

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.

Original language	English
Article number	100208
Journal	Additive Manufacturing Letters
Volume	9
DOIs	https://doi.org/10.1016/j.addlet.2024.100208
Publication status	Published - Apr 2024
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2024

ASJC Scopus Subject Areas

Mechanics of Materials
Materials Science (miscellaneous)
Industrial and Manufacturing Engineering
Engineering (miscellaneous)

Keywords

Additive manufacturing
B2 ordering
Fe-Co-2V (Hiperco)
Laser powder bed fusion
Magnetic properties

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10.1016/j.addlet.2024.100208

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

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 (Hc) ranging from 25.8 – 26.5 Oe, the annealed LPBF samples showed significantly lower coercivities (Hc) of 6.9 – 10.8 Oe. These lower Hc 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 (Ms), 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.",

keywords = "Additive manufacturing, B2 ordering, Fe-Co-2V (Hiperco), Laser powder bed fusion, Magnetic properties",

author = "Varahabhatla, {S. M.} and V. Chaudhary and Abhishek Sharma and Mantri, {S. A.} and Joshi, {S. S.} and Ramanujan, {R. V.} and Dahotre, {Narendra B.} and R. Banerjee",

note = "Publisher Copyright: {\textcopyright} 2024",

year = "2024",

month = apr,

doi = "10.1016/j.addlet.2024.100208",

language = "English",

volume = "9",

journal = "Additive Manufacturing Letters",

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T1 - Influence of annealing on enhancing soft magnetic properties in laser powder bed fusion processed Hiperco (Fe-49Co-2V)

AU - Varahabhatla, S. M.

AU - Chaudhary, V.

AU - Sharma, Abhishek

AU - Mantri, S. A.

AU - Joshi, S. S.

AU - Ramanujan, R. V.

AU - Dahotre, Narendra B.

AU - Banerjee, R.

PY - 2024/4

Y1 - 2024/4

N2 - 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 (Hc) ranging from 25.8 – 26.5 Oe, the annealed LPBF samples showed significantly lower coercivities (Hc) of 6.9 – 10.8 Oe. These lower Hc 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 (Ms), 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.

AB - 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 (Hc) ranging from 25.8 – 26.5 Oe, the annealed LPBF samples showed significantly lower coercivities (Hc) of 6.9 – 10.8 Oe. These lower Hc 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 (Ms), 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.

KW - Additive manufacturing

KW - B2 ordering

KW - Fe-Co-2V (Hiperco)

KW - Laser powder bed fusion

KW - Magnetic properties

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

Abstract

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Keywords

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