Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 309, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2022.117733
Keywords
Soft magnetic materials; In situ synthesis; Additive manufacturing; Crystallographic texture; Magnetic properties
Funding
- National Research Foundation of Korea (NRF) - Korean government (MSIP) [NRF-2021R1A2C3006662, NRF-2022R1A5A1030054]
- Brain Pool Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2020H1D3A1A04105882]
- Basic Science Research Program through the National Research Foun-dation of Korea (NRF) - Ministry of Education [2022R1A6A3A13073830]
- National Research Foundation of Korea [2020H1D3A1A04105882, 2022R1A6A3A13073830] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The present study focuses on improving the magnetic properties of in-situ synthesized Fe-Ni permalloy by engineering the predominant crystallographic texture. Two-step production approach consisting of crystallographic texture-engineered laser-based in situ alloying additive manufacturing and short-time heat treatment is an efficient route for enhancing the magnetic performance of soft magnetic materials.
The present study focused on improving the magnetic properties of in-situ synthesized Fe-Ni permalloy by engineering the predominant crystallographic texture. To this end, Fe-50 %Ni samples with homogeneous distributions of Fe and Ni were produced using three different rotation strategies through the directed energy deposition method and subsequent heat treatment. According to subsequent microstructural and crystallographic investigations, a pronounced S {123} (634) texture component and gamma-fiber texture were detected in the as -printed sample produced by 67 rotation, resulting in a relatively undesirable magnetic response. Better mag-netic properties were achieved in the 90 rotation strategy, with the Cube {001} (100) and Brass {011} (211) texture components predominating, and in the no rotation strategy, with the Cube {001} (100) and Copper {112} (111) texture components predominating. Heat treatment increased the intensity of the predominant texture components with no significant changes in grain size. On the other hand, short-time heat treatment for the purposes of texture sharpening and dislocation density reduction enhanced the magnetization saturation, coercivity, and Curie temperature values to-160 emg/g, 1.7 Oe, and-540 ?, respectively. These findings demonstrate that in comparison with the conventional process, the two-step production approach consisting of crystallographic texture-engineered laser-based in situ alloying additive manufacturing and short-time heat treatment is an efficient route for enhancing the magnetic performance of soft magnetic materials.
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