Influence of annealing on enhancing soft magnetic properties in laser powder bed fusion processed Hiperco (Fe-49Co-2V)
Journal article, 2024
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.
Magnetic properties
B2 ordering
Fe-Co-2V (Hiperco)
Laser powder bed fusion
Additive manufacturing
Author
S. M. Varahabhatla
University of North Texas
Varun Chaudhary
Chalmers, Industrial and Materials Science, Materials and manufacture
Abhishek Sharma
University of North Texas
S. A. Mantri
University of North Texas
S. S. Joshi
University of North Texas
R. V. Ramanujan
School of Materials Science and Engineering
N. B. Dahotre
University of North Texas
Rajarshi Banerjee
School of Materials Science and Engineering
University of North Texas
Additive Manufacturing Letters
27723690 (eISSN)
Vol. 9 100208Subject Categories (SSIF 2011)
Manufacturing, Surface and Joining Technology
DOI
10.1016/j.addlet.2024.100208