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.

Additive manufacturing

Fe-Co-2V (Hiperco)

Laser powder bed fusion

Magnetic properties

B2 ordering

Author

S. M. Varahabhatla

UNT College of Engineering

University of North Texas

Varun Chaudhary

Chalmers, Industrial and Materials Science, Materials and manufacture

Abhishek Sharma

UNT College of Engineering

S. A. Mantri

University of North Texas

UNT College of Engineering

S. S. Joshi

UNT College of Engineering

University of North Texas

R. V. Ramanujan

School of Materials Science and Engineering

N. B. Dahotre

UNT College of Engineering

University of North Texas

Rajarshi Banerjee

University of North Texas

School of Materials Science and Engineering

UNT College of Engineering

Additive Manufacturing Letters

27723690 (eISSN)

Vol. 9 100208

Subject Categories

Manufacturing, Surface and Joining Technology

DOI

10.1016/j.addlet.2024.100208

More information

Latest update

4/24/2024