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

Additive Manufacturing Letters (Apr 2024)

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

Affiliations

S.M. Varahabhatla: Center for Agile and Adaptive Additive Manufacturing (CAAAM), University of North Texas, Denton 76207, TX, USA; Department of Materials Science and Engineering, University of North Texas, Denton, 76207, TX, USA
V. Chaudhary: Industrial and Materials Science, Chalmers University of Technology, Gothenburg SE-41296, Sweden
Abhishek Sharma: Department of Materials Science and Engineering, University of North Texas, Denton, 76207, TX, USA
S.A. Mantri: Center for Agile and Adaptive Additive Manufacturing (CAAAM), University of North Texas, Denton 76207, TX, USA; Department of Materials Science and Engineering, University of North Texas, Denton, 76207, TX, USA
S.S. Joshi: Center for Agile and Adaptive Additive Manufacturing (CAAAM), University of North Texas, Denton 76207, TX, USA; Department of Materials Science and Engineering, University of North Texas, Denton, 76207, TX, USA
R.V. Ramanujan: School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore
Narendra B. Dahotre: Center for Agile and Adaptive Additive Manufacturing (CAAAM), University of North Texas, Denton 76207, TX, USA; Department of Materials Science and Engineering, University of North Texas, Denton, 76207, TX, USA
R. Banerjee: Center for Agile and Adaptive Additive Manufacturing (CAAAM), University of North Texas, Denton 76207, TX, USA; Department of Materials Science and Engineering, University of North Texas, Denton, 76207, TX, USA; School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore; Corresponding author.

Journal volume & issue: Vol. 9
p. 100208

Abstract

Read online

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.

Published in Additive Manufacturing Letters

ISSN: 2772-3690 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Technology (General): Industrial engineering. Management engineering
Website: https://www.journals.elsevier.com/additive-manufacturing-letters/

About the journal

Abstract

Keywords