Texture and microstructure characterizations of Fe-3.5wt%Si soft magnetic alloy fabricated via laser powder bed fusion
Manufacturing stable grain-oriented electric steel with fewer procedures remains a challenge due to the formation of detrimental γ-fiber (〈111〉//ND) texture. In this work, Laser Powder Bed Fusion (LPBF) process was employed to obtain a strong λ-fiber (〈100〉//ND) texture in a Fe-3.5wt%Si electrical s...
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Main Authors: | , , , , |
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Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2022
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Subjects: | |
Online Access: | https://hdl.handle.net/10356/161642 |
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Institution: | Nanyang Technological University |
Language: | English |
Summary: | Manufacturing stable grain-oriented electric steel with fewer procedures remains a challenge due to the formation of detrimental γ-fiber (〈111〉//ND) texture. In this work, Laser Powder Bed Fusion (LPBF) process was employed to obtain a strong λ-fiber (〈100〉//ND) texture in a Fe-3.5wt%Si electrical steel. The texture and microstructure were characterized by Electron Backscatter Diffraction (EBSD), Scanning Electron Microscopy/Energy Dispersive X-ray Spectroscopy (SEM/EDS) and High-Resolution Transmission Electron Microscopy (HRTEM). The EBSD results showed a strong λ-fiber texture on the top plane of Fe-Si alloy. It included {001}〈001〉 Cube texture, {001}〈110〉 rotated cube texture and {100}〈105〉 texture. With the lowest energy density, an area fraction of 16.6% γ-fiber texture was formed on the top plane. Additionally, the formation of amorphous precipitates in additively manufactured Fe-Si alloy was firstly reported. The lattice constant of 2.7975 Å was calculated in the matrix area. The work has shown LPBF can open a new door to manufacture grain-oriented electrical steel for industrial applications. |
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