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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Electrical Steels
Presentation Title Effects of Laser Treatment on the Magnetic Properties of FeSiB Amorphous Foil
Author(s) Michael McKinstry, Sameehan S Joshi, K.V. Mani Krishna, Madhavan Radhakrishnan, Narendra B. Dahotre
On-Site Speaker (Planned) Michael McKinstry
Abstract Scope In this study, FeSiB amorphous foils were subjected to single-track laser thermal treatments with laser fluences ranging from 0.42 J/mm2 to 0.91 J/mm2. A multi-pronged characterization approach was implemented employing site-specific transmission electron microscopy, differential scanning calorimetry, and X-ray diffraction to uncover the microstructure and phase evolution. Laser fluences ≤0.48 J/mm2 led to structural relaxation. An increase in laser fluence evolved partial crystallization featuring α-FeSi as a major phase. The volume fraction of α-FeSi continuously increased as a function of laser fluence, from 3.6 to 46 vol. %. Fe2B evolved as a secondary phase during partial recrystallization for laser fluences ≥0.53 J/mm2. Magnetic measurements using a vibrating sample magnetometer indicated that foils undergoing structural relaxation or experiencing the evolution of predominantly α-FeSi exhibited a similar response to the as-cast material. However, the formation of Fe2B even in minor quantities (~2-7% by volume) deteriorated the soft magnetic properties.
Proceedings Inclusion? Planned:
Keywords Magnetic Materials, Other,

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Alloy development and process optimisation for high performance processable electrical steels.
Crystallographic texture of electrical steels after hot torsion tests
Design of high silicon steel with improved physical properties
Effect of intercritical annealing time during hot rolling on the microstructure and magnetic properties of low-C grain non-oriented electrical steels with 2% Si
Effects of Laser Treatment on the Magnetic Properties of FeSiB Amorphous Foil
Full-field crystal plasticity finite element study on the microstructure and orientations evolution of columnar grains in electrical steels
Improved Magnetic Properties of a Non-oriented Electrical Steel through Hot Dipping Process
Microstructure and Texture Evolution of Fe-6.5 wt% Si Alloy Produced by Selective Laser Melting Method
Quasi-In-Situ EBSD Tracking of the Evolution of Microstructure and Microtexture during Hot Band Annealing of a 2.8 wt% Si Non-oriented Electrical Steel
Subsurface microstructure for silicon steel with ultra-low iron loss
Thermophysical Properties of Ladle Slag with Different SiO2 Content
uniform distribution of the magnetic easy axis on the lamination sheet plane.

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